Meaning of BOTTOM in English
( n. )
The part of anything which is beneath the contents and supports them, as the part of a chair on which a person sits, the circular base or lower head of a cask or tub, or the plank floor of a ship's hold; the under surface.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012