- familiar [fə mil′yər]adj.[ME familier < OFr < L familiaris, of a household, domestic < familia, FAMILY]1. Archaic having to do with a family2. friendly, informal, or intimate [to be on familiar terms]3. too friendly; unduly intimate or bold; presumptuous4. having an intimate knowledge of; closely acquainted (with) [familiar with the Bible]5. well-known; common; ordinary [a familiar sight]6. domesticated: said of animalsn.1.a) a close friend or associateb) Rare HABITUÉc) Archaic an ecclesiastical servant or agent2. Folklore an evil spirit constantly attending someone and typically dwelling within an animal; also, the animal within which such a spirit dwellsSYN.- COMMONfamiliarlyadv.SYN.- FAMILIAR is applied to that which is known through constant association, and, with reference to persons, suggests informality, or even presumption, such as might prevail among members of a family; CLOSE1 is applied to persons or things very near to one in affection, attraction, interests, etc.; INTIMATE implies very close association, acquaintance, relationship, etc. or suggests something of a very personal or private nature; CONFIDENTIAL implies a relationship in which there is mutual trust and a sharing of private thoughts, problems, etc.
English World dictionary. V. Neufeldt. 2014.