WordReference Random House Learner's Dictionary of American English © 2015
bot•tom /ˈbɑtəm/USA pronunciation n. 
    usually: the + ~]
  1. the lowest or deepest part of anything:the bottom of a page.
  2. the under or lower side; underside: the bottom of a keyboard.
  3. [singular;
    the + ~]
    the ground under a body of water:found the gangster's body at the bottom of the river.
  4. the end farthest from an entrance;
    the far end:the house at the bottom of the road.
  5. Furniturethe seat of a chair:a piece of gum on the bottom of the chair.
  6. Informal TermsInformal. the buttocks; rump.
  7. Clothing bottoms, [plural;
    used with a plural verb]
    the trousers or pants of a pair of pajamas:The pajama bottoms have a drawstring around the waist.
  8. Sportthe second half of an inning in baseball:the bottom of the sixth.
  9. the lowest level of dignity or status:The workers at the bottom do all the work.

  • bottom out, [no object] to reach the lowest state or level:The sagging economy has finally bottomed out.

  • adj. [before a noun]
  • of or relating to the bottom; on or at the bottom: the bottom floor.
  • lowest:the bottom button on a shirt.
  • idiom
    1. Idiomsat bottom, in reality;
      basically:a nice guy at bottom.
    2. Idiomsat the bottom of, really causing; responsible for:Who is at the bottom of all these leaks to the media?
    3. bet one's bottom dollar: 
      • to bet the last of one's money or resources.
      • to be positive or assured:You can bet your bottom dollar I'll be on time to receive the money!
    4. Idiomsbottoms up. This expression is used before swallowing a drink:"Bottoms up,'' he said and downed his drink.
    5. from the bottom of one's heart, very sincerely:I want to thank you from the bottom of my heart.
    6. get to the bottom of, [+ object] to determine the cause of:wanted to get to the bottom of this mystery.

    Collins Concise English Dictionary © HarperCollins Publishers::

    bottom /ˈbɒtəm/ n
    1. the lowest, deepest, or farthest removed part of a thing: the bottom of a hill
    2. the least important or successful position: the bottom of a class
    3. the ground underneath a sea, lake, or river
    4. the inner depths of a person's true feelings (esp in the phrase from the bottom of one's heart)
    5. the underneath part of a thing
    6. the parts of a vessel's hull that are under water
    7. (in literary or commercial contexts) a boat or ship
    8. (often plural) US Canadian the low land bordering a river
    9. (esp of horses) staying power; stamina
    10. importance, seriousness, or influence: his views all have weight and bottom
    11. informal the buttocks
    12. at bottomin reality; basically or despite appearances to the contrary
    13. be at the bottom ofto be the ultimate cause of
    14. get to the bottom ofto discover the real truth about
    adj (prenominal)
    1. lowest or last
    2. bet one's bottom dollar on, put one's bottom dollar onto be absolutely sure of (one's opinion, a person, project, etc)
    3. of, relating to, or situated at the bottom or a bottom: the bottom shelf
    4. fundamental; basic
    1. (transitive) to provide (a chair, etc) with a bottom or seat
    2. (transitive) to discover the full facts or truth of; fathom
    3. usually followed by on or upon: to base or be founded (on an idea, etc)
    Etymology: Old English botm; related to Old Norse botn, Old High German bodam, Latin fundus, Greek puthmēn

    'bottom' also found in these entries:

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