From Longman Dictionary of Contemporary Englishmixermix‧er /ˈmɪksə $ -ər/ noun [countable] 1 
DFUa piece of equipment used to mix things together an electric food mixer a cement mixer a shower mixer2 TCRAMa 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 mixer3 DFDa drink that can be mixed with alcohol, especially to make a cocktail We can use tonic water or orange juice as mixers.4 → good mixer5 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?
DFUa piece of equipment used to mix things together an electric food mixer a cement mixer a shower mixer2 TCRAMa 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 mixer3 DFDa drink that can be mixed with alcohol, especially to make a cocktail We can use tonic water or orange juice as mixers.4 → good mixer5 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?Examples from the Corpus
mixer• With a mixer, beat the egg yolks with the bread mixture and garlic.• Using an electric mixer or potato masher, mash potatoes until almost smooth.• Beat eggs and sugar with an electric mixer.• With an electric mixer, beat at low speed until moistened and then at medium speed for 3 minutes.• The output mixer is based on IC5, which is another summing mode circuit.• Sink mixers have divided flow so that the hot and cold water do not mix until they have left the tap.• The bar sells ¼ gill with mixer for £1 and a half pint soft drink will remain at 50p. 