A handheld kitchen utensil with rotating blades for beating, whipping, or mixing.
A kitchen utensil, esp. one with rotary blades, for beating eggs, whipping cream, etc.
(slang) A helicopter.
The definition of an eggbeater is a hand-held kitchen utensil with rotating blades used for beating, whipping or mixing.
An example of an eggbeater is what someone would use to whip heavy cream into whipped cream.