1.Of or pertaining to a family; domestic. "Familiar feuds."
2.Closely acquainted or intimate, as a friend or companion; well versed in, as any subject of study; as, familiar with the Scriptures.
3.Characterized by, or exhibiting, the manner of an intimate friend; not formal; unconstrained; easy; accessible. "In loose, familiar strains." "Be thou familiar, but by no means vulgar."
4.Well known; well understood; common; frequent; as, a familiar illustration. "That war, or peace, or both at once, may be As things acquainted and familiar to us." "There is nothing more familiar than this."
5.Improperly acquainted; wrongly intimate.