customary; usual; habitual: in their accustomed manner.
habituated; acclimated (usually followed by to): accustomed to staying up late; accustomed to the noise of the subway.

Origin of accustomed

late Middle English word dating back to 1400–50; see origin at accustom, -ed2
Related formsac·cus·tomed·ly, adverbac·cus·tomed·ness, nounhalf-ac·cus·tomed, adjectivewell-ac·cus·tomed, adjective

Synonyms for accustomed

1. characteristic, normal, regular. 2. used (to).

Antonyms for accustomed

1. unusual. 2. unused (to).


[uh-kuhs-tuh m]

verb (used with object)

to familiarize by custom or use; habituate: to accustom oneself to cold weather.

Origin of accustom

First recorded in 1425–75; late Middle English word from Middle French word acoustumer. See ac-, custom
Related formspre·ac·cus·tom, verb (used with object)re·ac·cus·tom, verb (used with object)un·ac·cus·tom, verb (used with object) Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for accustomed

Contemporary Examples of accustomed

Historical Examples of accustomed

  • The mass was an ornate one, though not more so than they were accustomed to at Beaulieu.

    The Armourer's Prentices

    Charlotte M. Yonge

  • Malbone knew the whole company, and greeted them with his accustomed ease.


    Thomas Wentworth Higginson

  • "But Harry and Philip are here all the time," said Kate, the accustomed soother.


    Thomas Wentworth Higginson

  • His horse, accustomed to a more open country, was continually at fault.

  • The afternoon was not spent as George had been accustomed to spend it.

    Life in London

    Edwin Hodder

British Dictionary definitions for accustomed



usual; customary
(postpositive foll by to) used or inured (to)
(postpositive foll by to) in the habit (of)accustomed to walking after meals



(tr usually foll by to) to make (oneself) familiar (with) or used (to), as by practice, habit, or experience

Word Origin for accustom

C15: from Old French acostumer, from costume custom
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for accustomed

late 15c., "made customary, habitual," past participle adjective from accustom (v.).



early 15c., from Old French acostumer (12c., Modern French accoutumer), from à "to" (see ad-) + costume (see costume (n.)). Related: Accustomed; accustoming.

Online Etymology Dictionary, © 2010 Douglas Harper