n. The state of being familiar, in any sense of that word; intimate knowledge; close or habitual acquaintance; free or unrestrained intercourse: followed by with before an object.n. An unusual liberty in act or speech from one person toward another; a freedom of conduct justified only by the most intimate relations, or exercised without warrant; an act of personal license, in either a good or a bad sense: most frequently in the plural: as, the familiarities of intimate friendship; his familiarities were repulsive.n. In astrol., any kind of aspect or reception.