To Bottom

1. (transitive) To furnish (something) with a bottom. [from 16th c.]
2. (transitive) To pour spirits into (a glass to be topped up with soda water).
3. (obsolete) To wind (like a ball of thread etc.). [17th c.]
4. (transitive) To establish or found (something) on or upon. [from 17th c.]
5. (transitive, chiefly in passive) To lie on the bottom of; to underlie, to lie beneath. [from 18th c.]
6. (obsolete, intransitive) To be based or grounded. [17th–19th c.]
7. (mechanics, intransitive) To reach or strike against the bottom of something, so as to impede free action. [from 19th c.]
8. (transitive) To reach the bottom of something.
9. To fall to the lowest point. [from 19th c.]
10. (BDSM, intransitive) To be the submissive partner in a BDSM relationship. [from 20th c.]
11. (gay slang, intransitive) To be anally penetrated in gay sex. [from 20th c.]