To furnish (something) with a bottom.
to bottom a chair
To wind (like a ball of thread etc.).
To establish or found (something) on or upon.
(chiefly in passive) To lie on the bottom of; to underlie, to lie beneath.
To be based or grounded.
To reach or strike against the bottom of something, so as to impede free action.
To reach the bottom of something.
To fall to the lowest point.
To be the more passive or receiving partner in a sexual act or relationship; to be submissive in a BDSM relationship; to be anally penetrated in gay sex.
I've never bottomed in my life.
(in combination) Having some specified type of bottom.