To withdraw from a commitment or position.
To take a less aggressive position in a conflict than one previously has or has planned to.
To abandon, forsake, discontinue (an action, habit, intention, etc), sometimes by open declaration.
To cast off, repudiate.
To fail to follow suit; playing a card of a different suit when having no card of the suit led.
To make a renunciation of something.
To give up, resign, surrender.
To surrender formally some right or trust.
To decline further association with someone or something, disown.
An act of renouncing.