a piece of equipment used to mix things together:
an electric food mixer
a cement mixer
a shower mixer
a piece of equipment or computer software which is used to control the sound levels or picture quality of a recording or film, or a person whose job is to use this equipment:
an audio mixer
a drink that can be mixed with alcohol, especially to make a cocktail:
We can use tonic water or orange juice as mixers.
someone who finds it easy to talk to people they do not know:
Media people need to be good mixers and good talkers.
5 American English old-fashionedDL
a party held so that people who have just met can get to know each other better:
Are you going to the freshman mixer?