A type of flat ribbon, made from any of a variety of materials woven in a twill pattern; a portion of such ribbon.

(nonstandard, proscribed) Half as much.

(trademark) An online social networking service that enables users to send and read short messages (280 characters; originally 140).

(Internet, informal, countable) A user account belonging to the above service. / (Internet, informal, uncountable, in the form […] Twitter) A community on Twitter.

(transitive, intransitive, Internet, sometimes proscribed) To tweet; to post an update to Twitter.

A machine for twisting twine; a kind of mule, or spinning machine.

plural of twine reeler

Libel in the context of the microblogging service Twitter.

(idiomatic, colloquial, humorous) A notional look of anticipation or hope (either for sex or a child) in one's father's eyes at or around the time of one's conception.

cotton yarn in cops, as spun on a mule; in distinction from yarn spun on a throstle frame