plural of RAT

(medicine, countable) Initialism of rapid antigen test. / (aviation, countable) Initialism of ram air turbine. / (computing, countable) Initialism of remote-access Trojan.

plural of 'rat

(chiefly informal) Short for muskrat.

simple past tense and past participle of rat

(Britain, slang) intoxicated

present participle of rat

(archaic) The blood sport of setting a dog upon rats confined in a pit to see how many he will kill in a given time.

plural of ratting

The quality of being a rat; rattiness.