in Grammar, a verbal noun of the neuter gender, partaking of the nature of a participle, declinable only in the singular number, through all the cases except the vocative; as non, amandum, gen. a-mandi, dat. amando, accuf. amandum, abl. amando. The word is formed of the Latin gerundivus, and that from the verb gerere, "to bear."

The gerund expresses not only the time, but also the manner, of an action; as, "he fell in running post." It differs from the participle, in that it expresses the time, which which the participle does not; and from the tense properly so called, in that it expresses the manner, which the tense does not. See Grammar.