Lacking personality; not-being a person: an impersonal force.
Showing no emotion or personality: an aloof, impersonal fashion.
Having no individual guide or link: an impersonal comment.
Not attentive to or expressive of human personalities: a large, impersonal business.
Grammar Of, concerning, or becoming a verb that conveys the activity of an unspecified topic, as in methinks, "it seems to me”; Latin pluit, "it rains”; or, with an expletive subject, it snowed.
Grammar Indefinite. Applied of pronouns.
perhaps not personal; maybe not representing someone; devoid of personality.
Lacking warmth or emotion; cool.
devoid of an interest, or having a third person pronoun without an antecedent.
perhaps not private; not representing a person; not having character.
maybe not private, maybe not present or manifested as someone; having no conscious individuality; not endued with character.
maybe not relating to someone, or even to any person or persons; having no private research; maybe not bearing the stamp of any specific personality: since, an impersonal comment.
In sentence structure, said of a verb perhaps not used in combination with an individual topic, or employed to state action without requirements of an actor, and therefore used only inside 3rd individual, and often without a subject expressed, or with only the indefinite it (French il, German es, etc.): therefore, Latin me personally tædet, French il m'ennuie, German es urgert mich, it irks myself; or German mich dunkt, methinks —that is. (to) me personally (it) seems (methinks is almost the only real relic left in English for the pure impersonal building without topic); or it rains that is. rainfall is being conducted; or Latin pugnatur, it is fought —that is, battling is being conducted. In lots of quasi-impersonal phrases the it really is a grammatical topic, anticipating a logical topic that comes later on: thus, it hurts anyone to fall —that is, falling hurts one; and so forth.
How would you define impersonal?