1. (noun)apostasy, renunciation, defection the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes) Synonyms: tergiversation, desertion, renunciation, apostasy, forswearing, renouncement, repudiation, defection, abandonment, forgoing
2. (noun)apostasy, tergiversation the act of abandoning a party for cause Synonyms: equivocation, renunciation, defection, apostasy, tergiversation