Impersonal means not being personal and describes someone or something that doesn't have a connection to any person or does not show emotions. (adjective)
A large corporation that doesn't focus on people is an example of something that would be described as impersonal.
A cold room devoid of personality or human touch is an example of a room that would be described as impersonal.
Lacking personality; not being a person: an impersonal force.
a. Showing no emotion or personality: an aloof, impersonal manner.
b. Having no personal reference or connection: an impersonal remark.
c. Not responsive to or expressive of human personalities: a large, impersonal corporation.
Grammar
a. Of, relating to, or being a verb that expresses the action of an unspecified subject, as in methinks, “it seems to me”; Latin pluit, “it rains”; or, with an expletive subject, it snowed.