Definition of "rancor" in English

noun

1. (American spelling) A feeling of long-lasting ire for another, sometimes to the point of hatred, over a perceived wrongdoing; bitterness.

   • I could almost see the rancor in his eyes when he challenged me to a fight.

2. (rare) Rancidity, rankness.

verb

1. (archaic) To rankle or fester.