- any of an order (Siphonaptera) of small, flattened, wingless insects with large legs adapted for jumping: as adults they are bloodsucking parasites on mammals and birds
- flea beetle
Origin of fleaMiddle English fle from Old English fleah, akin to German floh from same Germanic base as flee
flea in one's ear
a stinging rebuke or rebuff, or an annoying hint
- Any of various small, wingless, bloodsucking insects of the order Siphonaptera that are parasitic on mammals and birds and can jump long distances.
- Any of various small crustaceans that resemble or move like fleas, such as the water flea.
Origin of fleaMiddle English fle from Old English flēah
- Obsolete spelling of flay.
OriginSee also: fleá