1bot·tom 
/ˈbɑ:təm/ noun
plural bot·toms /ˈbɑ:təm/ noun 1 a [count] : the lowest part, point, or level of something — usually singular ▪ He's waiting at the bottom of the stairs. ▪ Our house is at the bottom of the hill. ▪ The top of the wall is painted and the bottom is covered in wood paneling. ▪ the bottom of the page/screen/list ▪ Please fill out this form and sign your name at the bottom.
b [count] : the part of something that is below or under the other parts — usually singular ▪ the ship's bottom [=underside] ▪ The bowl was signed on the bottom [=base] by the artist. ▪ There's a small cut on the bottom [=sole] of his foot.
c [count] : the lowest point or surface inside something : the part of something hollow that is furthest from the top — usually singular ▪ I think there is still a little sugar left in the bottom of the box/container. ▪ The pool is so deep I could not touch the bottom. ▪ One of the drawers has a false bottom. [=a panel that looks like the drawer's bottom but that can be removed to expose more space]
d [singular] chiefly Brit : the part of something that is furthest away
▪ We sailed to the bottom of the bay. ▪ the bottom of the garden 2 [count] : the part of the body on which you sit : buttocks
▪ The poor baby has a rash all over his little bottom. 3 a [singular] : a position of little power in a company or organization
▪ The company's new CEO started at the bottom and worked her way up.
b [singular] : a low rank or position
▪ Why do I always find myself rooting for the team at the bottom of the league? ▪ She graduated at the bottom of her/the class. [=her grades were among the lowest in her graduating class]
c [noncount] : the worst position, level, or condition
▪ at the bottom of the pay scale ▪ After weeks of losing value, the company's stocks have hit bottom. [=reached the bottom; lost all value] ▪ Jim has finally scraped bottom. [=has finally reached the worst possible condition] — see also rock bottom 4 a [singular] : the surface that is under a body of water
▪ the bottom of the ocean ▪ the sandy river/lake bottom
b bottoms [plural] : the flat, low land along a river or stream : bottomland
▪ grazing in grassy river bottoms 5 [count] : a piece of clothing that is worn on the lower part of the body
▪ a bikini bottom — often plural ▪ pajama bottoms — see color picture 6 [singular] : the second half of an inning in baseball
▪ They tied the score in the bottom of the ninth inning. 7 [noncount] chiefly Brit : the lowest gear of a car
▪ Stay in bottom [=bottom gear] until you reach the top of the hill.
b [count] : the part of something that is below or under the other parts — usually singular ▪ the ship's bottom [=underside] ▪ The bowl was signed on the bottom [=base] by the artist. ▪ There's a small cut on the bottom [=sole] of his foot.
c [count] : the lowest point or surface inside something : the part of something hollow that is furthest from the top — usually singular ▪ I think there is still a little sugar left in the bottom of the box/container. ▪ The pool is so deep I could not touch the bottom. ▪ One of the drawers has a false bottom. [=a panel that looks like the drawer's bottom but that can be removed to expose more space]
d [singular] chiefly Brit : the part of something that is furthest away
▪ We sailed to the bottom of the bay. ▪ the bottom of the garden
▪ The poor baby has a rash all over his little bottom.
▪ The company's new CEO started at the bottom and worked her way up.
b [singular] : a low rank or position
▪ Why do I always find myself rooting for the team at the bottom of the league? ▪ She graduated at the bottom of her/the class. [=her grades were among the lowest in her graduating class]
c [noncount] : the worst position, level, or condition
▪ at the bottom of the pay scale ▪ After weeks of losing value, the company's stocks have hit bottom. [=reached the bottom; lost all value] ▪ Jim has finally scraped bottom. [=has finally reached the worst possible condition] — see also rock bottom
▪ the bottom of the ocean ▪ the sandy river/lake bottom
b bottoms [plural] : the flat, low land along a river or stream : bottomland
▪ grazing in grassy river bottoms
▪ a bikini bottom — often plural ▪ pajama bottoms — see color picture
▪ They tied the score in the bottom of the ninth inning.
▪ Stay in bottom [=bottom gear] until you reach the top of the hill.
at bottom
chiefly Brit : in reality : really
▪ The song is, at bottom [=in truth], a lullaby. ▪ He is very shy, at bottom.
▪ The song is, at bottom [=in truth], a lullaby. ▪ He is very shy, at bottom.
at the bottom of the pile — see 1pile
be/lie at the bottom of
chiefly Brit : to be the source or originator of (something)
▪ I think I know who's at the bottom of [=behind] these pranks.
▪ I think I know who's at the bottom of [=behind] these pranks.
bottoms up
informal — used as a toast or to tell people to finish their drinks ▪ Here's to the groom-to-be! Bottoms up!
from the bottom of your heart — see heart
from top to bottom — see 1top
get to the bottom of
: to find out the true reason for or cause of (something)
▪ Police are working furiously to get to the bottom of this recent string of violent crimes.
▪ Police are working furiously to get to the bottom of this recent string of violent crimes.
the bottom drop/fall out
◊If the bottom drops/falls out of something, it suddenly fails or becomes unable to continue in a normal and effective way.
▪ Analysts warn that recent changes in the region may result in the bottom dropping out of the oil market. [=may cause the oil market to collapse] ▪ When the accident happened, she felt the bottom drop out of her world. [=she felt her world collapse]
▪ Analysts warn that recent changes in the region may result in the bottom dropping out of the oil market. [=may cause the oil market to collapse] ▪ When the accident happened, she felt the bottom drop out of her world. [=she felt her world collapse]
the bottom of the barrel
: the lowest possible condition, level, etc.
▪ After the divorce, Tim felt he had reached/hit the bottom of the barrel. ▪ The excessive coverage of the scandal signals that the news media may have finally hit/reached the bottom of the barrel. ▪ Salaries in the industry are scraping/hitting the bottom of the barrel. [=salaries in the industry are very low]
▪ After the divorce, Tim felt he had reached/hit the bottom of the barrel. ▪ The excessive coverage of the scandal signals that the news media may have finally hit/reached the bottom of the barrel. ▪ Salaries in the industry are scraping/hitting the bottom of the barrel. [=salaries in the industry are very low]
— bot·tomed /ˈbɑ:təmd/ adjective
▪ flat bottomed boats
/ˈbɑ:təmd/ adjective ▪ flat bottomed boats
