renunciation

/rɪˌnʌnsiˈeɪʃən/

Other forms: renunciations

If you reject something or disown it, you can call this renunciation. Sorry, your renunciation of your membership in the American Association of Retired People will not make you any younger.

Use the noun renunciation especially when you mean you have given up your religious or political beliefs or some cause you previously supported. When you drop a political party to become an independent, you mean it to be a renunciation of all the infighting, backstabbing, and finger pointing that have become "politics as usual."

Definitions of renunciation

1. noun

   the act of renouncing; sacrificing or giving up or surrendering (a possession or right or title or privilege etc.)
   synonyms: forgoing, forswearing

   types:

   forsaking, giving up

   the act of forsaking

   abnegation, denial, self-abnegation, self-denial, self-renunciation

   renunciation of your own interests in favor of the interests of others

   type of:

   rejection

   the act of rejecting something
2. noun

   an act (spoken or written) declaring that something is surrendered or disowned
   synonyms: renouncement

   types:

   relinquishing, relinquishment

   a verbal act of renouncing a claim or right or position etc.

   giving up, surrender, yielding

   a verbal act of admitting defeat

   type of:

   resignation

   the act of giving up (a claim or office or possession etc.)
3. noun

   rejecting or disowning or disclaiming as invalid
   synonyms: repudiation

   types:

   disclaimer

   (law) a voluntary repudiation of a person's legal claim to something

   disowning, disownment

   refusal to acknowledge as one's own

   type of:

   rejection

   the speech act of rejecting
4. noun

   the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes)
   synonyms: apostasy, defection

   type of:

   rejection

   the state of being rejected