WordReference Random House Learner's Dictionary of American English © 2015
bot•tom /ˈbɑtəm/USA pronunciation
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.
usually: the + ~]
- the lowest or deepest part of anything:the bottom of a page.
- the under or lower side; underside: the bottom of a keyboard.
the + ~] the ground under a body of water:found the gangster's body at the bottom of the river.
- the end farthest from an entrance;
the far end:the house at the bottom of the road.
- Furniturethe seat of a chair:a piece of gum on the bottom of the chair.
- Informal TermsInformal. the buttocks; rump.
- 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.
- Sportthe second half of an inning in baseball:the bottom of the sixth.
- the lowest level of dignity or status:The workers at the bottom do all the work.
- Idiomsat bottom, in reality;
basically:a nice guy at bottom.
- Idiomsat the bottom of, really causing; responsible for:Who is at the bottom of all these leaks to the media?
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!
- Idiomsbottoms up. This expression is used before swallowing a drink:"Bottoms up,'' he said and downed his drink.
- from the bottom of one's heart, very sincerely:I want to thank you from the bottom of my heart.
- 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
- the lowest, deepest, or farthest removed part of a thing: the bottom of a hill
- the least important or successful position: the bottom of a class
- the ground underneath a sea, lake, or river
- the inner depths of a person's true feelings (esp in the phrase from the bottom of one's heart)
- the underneath part of a thing
- the parts of a vessel's hull that are under water
- (in literary or commercial contexts) a boat or ship
- (often plural) US Canadian the low land bordering a river
- (esp of horses) staying power; stamina
- importance, seriousness, or influence: his views all have weight and bottom
- informal the buttocks
- at bottom ⇒ in reality; basically or despite appearances to the contrary
- be at the bottom of ⇒ to be the ultimate cause of
- get to the bottom of ⇒ to discover the real truth about
- lowest or last
- bet one's bottom dollar on, put one's bottom dollar on ⇒ to be absolutely sure of (one's opinion, a person, project, etc)
- of, relating to, or situated at the bottom or a bottom: the bottom shelf
- fundamental; basic
Etymology: Old English botm; related to Old Norse botn, Old High German bodam, Latin fundus, Greek puthmēn
- (transitive) to provide (a chair, etc) with a bottom or seat
- (transitive) to discover the full facts or truth of; fathom
- usually followed by on or upon: to base or be founded (on an idea, etc)
'bottom' also found in these entries: