a person who deserts one cause or party for the opposite faction; renegade
WordReference Random House Learner's Dictionary of American English © 2025
turn•coat /ˈtɜrnˌkoʊt/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2025- one who changes to the opposite side, reverses principles, etc.;
a renegade.
turn•coat
(tûrn′kōt′),USA pronunciation n.
- a person who changes to the opposite party or faction, reverses principles, etc.;
renegade.
- turn + coat 1550–60
Collins Concise English Dictionary © HarperCollins Publishers::
'turncoat' also found in these entries (note: many are not synonyms or translations):