'Turncoat' definitions:

Definition of 'turncoat'

From: WordNet
noun
A disloyal person who betrays or deserts his cause or religion or political party or friend etc. [syn: deserter, apostate, renegade, turncoat, recreant, ratter]

Definition of 'Turncoat'

From: GCIDE
  • Turncoat \Turn"coat`\ (t[^u]rn"k[=o]t`), n. One who forsakes his party or his principles; a renegade; an apostate; a defector to the enemy. [1913 Webster]
  • He is a turncoat, he was not true to his profession. --Bunyan. [1913 Webster]