M legal definition

noun pl. M's, m's

1. the thirteenth letter of the English alphabet: from the Greek mu, derived ultimately from the Phoenician
2. any of the speech sounds that this letter represents, as, in English, the (m) of milk or stratagem
3. a type or impression for m or M
4. the thirteenth in a sequence or group
5. Printing an em (Example: a “ dash” is a dash that is one em long)
6. an object shaped like

adjective

1. of m or M
2. thirteenth in a sequence or group
3. shaped like