Noun backwash has 3 senses
- slipstream, airstream, race, backwash, wash - the flow of air that is driven backwards by an aircraft propeller
--1 is a kind of flow
- aftermath, wake, backwash - the consequences of an event (especially a catastrophic event); "the aftermath of war"; "in the wake of the accident no one knew how many had been injured"
--2 is a kind of consequence, effect, outcome, result, event, issue, upshot
- wake, backwash - the wave that spreads behind a boat as it moves forward; "the motorboat's wake capsized the canoe"
--3 is a kind of wave, moving ridge
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