Webster's Revised Unabridged Dictionary · 1913

Mixer

Mixer , noun

1.
One who, or that which, mixes.
2.
A person who has social intercourse with others of many sorts; a person viewed as to his casual sociability; -- commonly used with some characterizing adjective; as, a good mixer; a bad mixer. [Colloquial or Slang, United States]
3.
a social gathering, game, or dance organized to provide an opportunity for people to meet each other; as, on the first night of the conference they had a wine-and-cheese mixer.
4.
a nonalcoholic beverage (such as fruit juice, club soda or ginger ale) added to an alcoholic beverage to produce a mixed drink.
5.
any device used for mixing.
6.
an electronic device for blending or manipulating sounds from different sources to produce a composite soundtrack, for an audio recording, video recording, or a movie.
7.
The technician who operates a mixer.