Entry 2 senses Webster, 1913 Ratting /(răt"tĭng)/ · Rat·ting · IPA 01 n. The conduct or practices of one who rats. See Rat, v. i., 1. 1. The conduct or practices of one who rats. See Rat, v. i., 1. See: Rat 2. The low sport of setting a dog upon rats confined in a pit to see how many he will kill in a given time.