'Impersonal verb' definitions:

Definition of 'Impersonal verb'

From: GCIDE

Impersonal \Im*per"son*al\, a. [L. impersonalis; pref. im- not + personalis personal: cf. F. impersonnel. See Personal.] Not personal; not representing a person; not having personality. [1913 Webster]
An almighty but impersonal power, called Fate. --Sir J. Stephen. [1913 Webster]
Impersonal verb (Gram.), a verb used with an indeterminate subject, commonly, in English, with the impersonal pronoun it; as, it rains; it snows; methinks (it seems to me). Many verbs which are not strictly impersonal are often used impersonally; as, it goes well with him. [1913 Webster]