lock

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 [ˈlɒk]



WordReference Random House Learner's Dictionary of American English © 2019
lock1 /lɑk/USA pronunciation   n. 
    [countable]
  1. Buildinga device for keeping a door, gate, lid, drawer, or the like securely closed or fastened, made up of a bolt or system of bolts moved by a key, dial, etc.
  2. (in a firearm) the mechanism that explodes the charge.
  3. Civil Engineeringan enclosed chamber in a canal, dam, etc., with gates at each end, for raising or lowering vessels from one level to another by increasing or decreasing water in the chamber.
  4. complete and unchallenged control or an unbreakable hold:to have a lock on the senatorial nomination.
  5. Slang Termsa sure thing:The team is a lock to win the championship.

v. 
  1. to (cause a door, window, building, etc., to) become fastened or made secure by the operation of a lock or locks: [+ object]I locked the car doors.[no object]The car doors lock automatically.
  2. to shut in a place by or as if by means of a lock:[+ object]We locked the hamster in its cage.
  3. to (cause to) become fastened, fixed, interlocked, or jammed by or as if by a lock: [+ object]to lock the steering wheel on a car to prevent theft.[no object]The gears locked into place.
  4. to unite firmly by linking:[+ object]to lock arms.
  5. to hold fast in an embrace:[+ object]She locked him in her arms.
  6. lock in: 
    • to (cause to) be aimed at (a target or goal) and be unable to change: [+ in + object]The pilot locked in his target.[+ object + in]The pilot locked it in and fired.[+ in + on + object]The missiles locked in on the target.
    • to put into a place, room, etc., and lock its doors: [+ object + in]They locked him in with the other prisoners.[+ in + object]The guard locked in the prisoners every night.
  7. lock out: 
    • [+ object + out] to keep out by or as if by a lock:I was locked out of my car.
    • to subject (employees) to a lockout: [+ out + object]The boss locked out the striking employees.[+ object + out]to lock them out if they don't negotiate.
  8. lock up: 
    • to imprison for a crime: [+ object + up]took him away and locked him up.[+ up + object]locking up criminals.
    • to make secure with a lock: [+ up + object]locked up the money in his safe.[+ object + up]locked the money up in his safe.[no object]The watchman locked up for the night.
    • to fasten or fix firmly, as by engaging parts: [no object]The car's brakes locked up.[+ up + object]Slamming on the brakes will lock up your wheels.[+ object + up]Something locked the gears up.
Idioms
  1. Idiomslock horns, [~ (+ with + object)] to come into conflict;
    clash:They locked horns with their critics.
  2. Idiomslock, stock, and barrel, with every part or item included;
    completely:He'll sue you lock, stock, and barrel.
  3. Idiomsunder lock and key, securely locked up:to keep important papers under lock and key.


lock2 /lɑk/USA pronunciation   n. [countable]
  1. a tuft or ringlet of hair.
  2. locks, [plural] the hair of the head:golden locks.

WordReference Random House Unabridged Dictionary of American English © 2019
lock1  (lok),USA pronunciation n. 
  1. Buildinga device for securing a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a key, dial, etc.
  2. Buildinga contrivance for fastening or securing something.
  3. (in a firearm)
    • the mechanism that explodes the charge;
      gunlock.
    • safety (def. 4).
  4. Buildingany device or part for stopping temporarily the motion of a mechanism.
  5. Civil Engineeringan enclosed chamber in a canal, dam, etc., with gates at each end, for raising or lowering vessels from one level to another by admitting or releasing water.
  6. an air lock or decompression chamber.
  7. complete and unchallenged control;
    an unbreakable hold:The congresswoman has a lock on the senatorial nomination.
  8. Slang Termssomeone or something certain of success;
    sure thing:He's a lock to win the championship.
  9. Sport[Wrestling.]any of various holds, esp. a hold secured on the arm, leg, or head:leg lock.
  10. Time[Horol.](in an escapement) the overlap between a tooth of an escape wheel and the surface of the pallet locking it.
  11. Metallurgya projection or recession in the mating face of a forging die.
  12. Idiomslock, stock, and barrel, completely;
    entirely;
    including every part, item, or facet, no matter how small or insignificant:We bought the whole business, lock, stock, and barrel.
  13. Idiomsunder lock and key, securely locked up:The documents were under lock and key.

v.t. 
  1. Buildingto fasten or secure (a door, window, building, etc.) by the operation of a lock or locks.
  2. Buildingto shut in a place fastened by a lock or locks, as for security or restraint.
  3. Buildingto make fast or immovable by or as if by a lock:He locked the steering wheel on his car.
  4. Buildingto make fast or immovable, as by engaging parts:to lock the wheels of a wagon.
  5. to join or unite firmly by interlinking or intertwining:to lock arms.
  6. to hold fast in an embrace:She was locked in his arms.
  7. Civil Engineering, Nautical, Naval Termsto move (a ship) by means of a lock or locks, as in a canal (often fol. by through, in, out, down, or up).
  8. Civil Engineeringto furnish with locks, as a canal.

v.i. 
  1. to become locked:This door locks with a key.
  2. Buildingto become fastened, fixed, or interlocked:gears that lock into place.
  3. to go or pass by means of a lock or locks, as a vessel.
  4. Civil Engineeringto construct locks in waterways.
  5. Idiomslock horns, to come into conflict;
    clash:to lock horns with a political opponent.
  6. lock in: 
    • to commit unalterably:to lock in the nomination of the party's candidates.
    • (of an investor) to be unable or unwilling to sell or shift securities.
  7. Civil Engineeringlock off, to enclose (a waterway) with a lock.
  8. Electronicslock on, to track or follow a target or object automatically by radar or other electronic means.
  9. lock out: 
    • to keep out by or as if by a lock.
    • to subject (employees) to a lockout.
  10. lock up: 
    • to imprison for a crime.
    • Printingto make (type) immovable in a chase by securing the quoins.
    • to fasten or secure with a lock or locks.
    • to lock the doors of a house, automobile, etc.
    • to fasten or fix firmly, as by engaging parts.
lockless, adj. 
  • bef. 900; Middle English; Old English loc fastening, bar; cognate with Middle Low German lok, Old High German loh, Old Norse lok a cover, lid, Gothic -luk in usluk opening; akin to Old English lūcan to shut

lock2  (lok),USA pronunciation n. 
  1. a tress, curl, or ringlet of hair.
  2. locks: 
    • the hair of the head.
    • short wool of inferior quality, as that obtained in small clumps from the legs.
  3. a small tuft or portion of wool, cotton, flax, etc.
  • Middle English locke, Old English locc lock of hair, cognate with Old Norse lokkr, Dutch lok curl, German Locke bef. 900


Collins Concise English Dictionary © HarperCollins Publishers::

lock /lɒk/ n
  1. a device fitted to a gate, door, drawer, lid, etc, to keep it firmly closed and often to prevent access by unauthorized persons
  2. a similar device attached to a machine, vehicle, etc, to prevent use by unauthorized persons: a steering lock
  3. a section of a canal or river that may be closed off by gates to control the water level and the raising and lowering of vessels that pass through it
  4. (as modifier): a lock gate
  5. the jamming, fastening, or locking together of parts
  6. Brit the extent to which a vehicle's front wheels will turn to the right or left: this car has a good lock
  7. a mechanism that detonates the charge of a gun
  8. US Canadian informal a person or thing that is certain to win or to succeed: she is a lock for the Academy Award
  9. lock, stock, and barrelcompletely; entirely
  10. any wrestling hold in which a wrestler seizes a part of his opponent's body and twists it or otherwise exerts pressure upon it
  11. Also called: lock forward either of two players who make up the second line of the scrum and apply weight to the forwards in the front line
  12. a gas bubble in a hydraulic system or a liquid bubble in a pneumatic system that stops or interferes with the fluid flow in a pipe, capillary, etc: an air lock
vb
  1. to fasten (a door, gate, etc) or (of a door, etc) to become fastened with a lock, bolt, etc, so as to prevent entry or exit
  2. (transitive) to secure (a building) by locking all doors, windows, etc
  3. to fix or become fixed together securely or inextricably
  4. to become or cause to become rigid or immovable: the front wheels of the car locked
  5. (when tr, often passive) to clasp or entangle (someone or each other) in a struggle or embrace
  6. (transitive) to furnish (a canal) with locks
  7. (transitive) to move (a vessel) through a system of locks
  8. lock horns(esp of two equally matched opponents) to become engaged in argument or battle
  9. lock the stable door after the horse has bolted, lock the stable door after the horse has been stolento take precautions after harm has been done

See also lock out, lock upEtymology: Old English loc; related to Old Norse lok

ˈlockable adj
lock /lɒk/ n
  1. a strand, curl, or cluster of hair
  2. a tuft or wisp of wool, cotton, etc
  3. (plural) chiefly literary hair, esp when curly or fine
Etymology: Old English loc; related to Old Frisian lok, Old Norse lokkr lock of wool



'lock' also found in these entries:
Collocations: lock the [door, car, house, safe], a [door, window, bike, car, drawer, steering] lock, the lock [gate, keeper, system], more...

Forum discussions with the word(s) "lock" in the title:


Look up "lock" at Merriam-Webster
Look up "lock" at dictionary.com

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