(transitive, intransitive) To make or become familiar with something or someone.

(witchcraft) An attendant spirit, often in animal or demon form. / (obsolete) A member of one's family or household. / A member of a pope's or bishop's household. / (obsolete) A close friend.

Known to one, or generally known; commonplace. / Acquainted. / Intimate or friendly. / Of or pertaining to a family; familial.

Quality of being familiar.

plural of familiarism

(uncountable) The quality of being intimate or friendly. / (countable) A word or expression used in intimate or friendly contexts.

In a familiar situation

(social psychology) A stranger who is nonetheless recognized by another from regularly sharing a common physical space such as a street or bus stop, but with whom one does not interact.

plural of familiar stranger

The more an individual becomes acquainted with another person, and the more the individual knows about his or her shortcomings, the easier it becomess to dislike that person.