not showing, influenced by, or involving personal feelings or opinions; objective or unbiased

cold, formal, or detached

He spoke in a flat impersonal tone

not having human characteristics

an impersonal deity

said of a verb: used to express an action that has no definite subject, the subject in English usu being it, e.g. rained in it rained

said of a pronoun: not referring to a particular person, e.g. it in it rained