familiar

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Often encountered or seen. See Synonyms at common.
2. adj. Having fair knowledge; acquainted: was familiar with those roads.
3. adj. Of established friendship; intimate: on familiar terms.
4. adj. Natural and unstudied; informal: lectured in a familiar style.
5. adj. Taking undue liberties; presumptuous: Students should not be familiar toward an instructor.
6. adj. Familial.
7. adj. Domesticated; tame. Used of animals.
8. n. A close friend or associate.
9. n. An attendant spirit, often taking animal form.
10. n. One who performs domestic service in the household of a high official.
11. n. A person who frequents a place.

Century Dictionary and Cyclopedia

1. Pertaining to a family; domestic.
2. Having, or springing from, intimate and friendly social relations; closely intimate: as, a familiar friend; familiar companionship; to be on familiar terms with one.
3. Having a friendly aspect or manner; exhibiting the manner of an intimate friend; affable; not formal or distant; especially, using undue familiarity; intrusive; forward.
4. Characterized by ease or absence of stiffness or pedantry; unconstrained.
5. Having an intimate knowledge; well knowing; well acquainted; well versed (in a subject of study): as, he is familiar with the works of Horace.
6. Well known from frequent observation, use, etc.; well understood.
7. Synonyms Close, intimate, amicable, fraternal, near.
8. n. A familiar friend; an intimate; a close companion; one long acquainted; one accustomed to another by free, unreserved converse.
9. n. A familiar spirit; a demon or evil spirit supposed to attend at call. See familiar spirit, under I.
10. n. In the Roman Catholic Church, a member of the household of the pope or of a bishop, supported at his expense, and rendering him domestic, though not menial service. The familiar must live in the diocese of his superior.
11. n. An officer of the Tribunal of the Inquisition who arrested persons accused or suspected. See inquisition.

Wiktionary

1. adj. Known to one.
2. adj. Acquainted.
3. adj. Intimate or friendly.
4. adj. Inappropriately intimate or friendly.
5. adj. Of or pertaining to a family; familial.
6. n. obsolete A member of one's family or household.
7. n. obsolete A close friend.
8. n. An attendant spirit often in animal form.

GNU Webster's 1913

1. adj. Of or pertaining to a family; domestic.
2. adj. Closely acquainted or intimate, as a friend or companion; well versed in, as any subject of study.
3. adj. Characterized by, or exhibiting, the manner of an intimate friend; not formal; unconstrained; easy; accessible.
4. adj. Well known; well understood; common; frequent.
5. adj. Improperly acquainted; wrongly intimate.
6. n. An intimate; a companion.
7. n. An attendant demon or evil spirit.
8. n. (Court of Inquisition) A confidential officer employed in the service of the tribunal, especially in apprehending and imprisoning the accused.

WordNet 3.0

1. adj. having mutual interests or affections; of established friendship
2. adj. (usually followed by `with') well informed about or knowing thoroughly
3. adj. well known or easily recognized
4. n. a friend who is frequently in the company of another
5. n. a spirit (usually in animal form) that acts as an assistant to a witch or wizard
6. adj. within normal everyday experience; common and ordinary; not strange
7. n. a person attached to the household of a high official (as a pope or bishop) who renders service in return for support