1. (a.) Of or pertaining to a family; domestic.

2. (a.) Closely acquainted or intimate, as a friend or companion; well versed in, as any subject of study; as, familiar with the Scriptures.

3. (a.) Characterized by, or exhibiting, the manner of an intimate friend; not formal; unconstrained; easy; accessible.

4. (a.) Well known; well understood; common; frequent; as, a familiar illustration.

5. (a.) Improperly acquainted; wrongly intimate.

6. (n.) An intimate; a companion.

7. (n.) An attendant demon or evil spirit.

8. (n.) A confidential officer employed in the service of the tribunal, especially in apprehending and imprisoning the accused.

Bohemian abreast accepted accustomed acquaintance acquainted acquainted with advocate affable alter ego amicable amigo ancestral spirits angel arrogant attendant godling au courant au fait audacious average aware back-number backer banal best friend bewhiskered bold boon bosom friend bromidic brother buddy-buddy bumptious casual casual acquaintance chatty chummy close close acquaintance close friend cognizant cold colloquial comfortable common commonly known commonplace confidant confidante confidential conformable conscious consuetudinary control contumelious conventional conversant conversant with conversational cool cordial corny cozy current customary cut-and-dried daemon degage demon disdainful disrespectful easy easygoing established everyday fade fairy godmother familiar spirit familiar with favorer fellow fellow creature fellowman folksy forward free free and easy frequent fresh friend friendly fusty generally accepted genial genius genius domus genius loci good angel good genius gracious guardian guardian angel guardian spirit guide habitual hackney hackneyed hand and glove hand-in-hand haymish homely homey household household gods hubristic impertinent impudent informal informed informed of inseparable inseparable friend insolent insulting intimate intrusive invisible helper irregular lares and penates lares compitales lares familiaris lares permarini lares praestites lares viales loose lover manes mate mindful ministering angel moth-eaten musty natural near neighbor neighborly no stranger to nonstandard normal normative notorious numen obtaining obtrusive offhand offhanded officious old hat ordinary other self overpresumptuous overweening palsy-walsy partisan penates pickup plain platitudinous popular predominating prescribed prescriptive presuming presumptuous prevailing prevalent privy to procacious prosaic proverbial public pushy received regular regulation relaxed repository routine set simple snug sociable social special providence spoken square stale standard stereotyped stock substandard supporter sympathizer talked-about talked-of tete-a-tete thick thick as thieves threadbare time-honored timeworn totem traditional trite truistic tutelar god tutelary unaffected unassuming unceremonious unconstrained unconventional uneducated universal universally admitted universally recognized unliterary unofficial unoriginal unreserved unrestrained unstudied up up on uppish uppity usual vernacular versed warmed-over well-kenned well-known well-recognized well-understood well-wisher well-worn widely known widespread wonted worn worn thin