Definition of "bottom" []

• The deepest or lowest part: the bottom of a well; the bottom of the page. (noun)
• The part closest to a reference point: was positioned at the bottom of the key for a rebound. (noun)
• The underside: scraped the bottom of the car on a rock. (noun)
• The supporting part; the base. (noun)
• The far end or part: at the bottom of the bed. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "_depth-gage_, _F_, adjusted by a screw, and a _slitting cutter_ with stop, a _sliding section_, _B_, with a vertically adjustable bottom, the _auxiliary center bottom_, _C_, to be placed when needed in front of the cutter as an extra support or stop."
• "As a snapshot of the food chain, it undoubtedly shed new light on the term bottom feeder."
• "If you look at the webpage near the bottom is a rattle fly."