[n] the act of renouncing; sacrificing or giving up or surrendering (a possession or right or title or privilege etc.)
[n] rejecting or disowning or disclaiming as invalid; "Congressional repudiation of the treaty that the President had negotiated"
[n] an act (spoken or written) declaring that something is surrendered or disowned
[n] the state of having rejected your religious beliefs or your political party or a cause (often in favor of opposing beliefs or causes)