Meaning of MIXER in English
[noun] [C]You'll get to know lots of people at college if you're a good mixer - bad mixers have a difficult time.(US) A mixer can also be a party or dance which has been organized so that people in a group can get to know each other.The school always holds a mixer on the second week of the term.
Cambridge English vocab. Кембриджский английский словарь. 2012