A mixer is a machine that combines ingredients together by spinning or stirring them. In a kitchen, an electric mixer has rotating beaters that whip cream, blend cake batter, or mix cookie dough far faster than you could stir by hand. Construction workers use cement mixers: large rotating drums that tumble cement, sand, water, and gravel until they blend into concrete.

The word also describes a social gathering designed to help people meet each other and start conversations. Schools might hold an ice cream social or game night as a mixer so new students can make friends. When adults attend a professional mixer, they're networking and meeting colleagues in their field.

In audio and music production, a mixer is equipment that combines different sound sources. A recording studio uses a mixer to balance the vocals, drums, guitar, and other instruments into one song. A DJ uses a mixer to blend tracks smoothly so the music keeps playing without awkward gaps.

The common thread? A mixer brings separate things together into something unified, whether that's ingredients becoming cake batter, new people becoming acquaintances, or individual instruments becoming a complete song.