adjective

1. Archaic having to do with a family
2. friendly, informal, or intimate to be on familiar terms
3. too friendly; unduly intimate or bold; presumptuous
4. having an intimate knowledge of; closely acquainted (with) familiar with the Bible
5. well-known; common; ordinary a familiar sight
6. domesticated: said of animals

Etymology: ME familier < OFr < L familiaris, of a household, domestic < familia, family

noun

1. 1. a close friend or associate
   2. Rare habitué
   3. Archaic an ecclesiastical servant or agent
2. Folklore an evil spirit constantly attending someone and typically dwelling within an animal; also, the animal within which such a spirit dwells