ac·​cus·​tom ə-ˈkə-stəm How to pronounce accustom (audio)
accustomed; accustoming; accustoms

transitive verb

: to make familiar with something through use or experience
accustomation noun

Example Sentences

the task of accustoming new recruits to shipboard life
Recent Examples on the Web The beginner tips advise readers to increase their activity to better accustom their body to running. Liam Gravvat, USA TODAY, 23 Sep. 2022 Diddy, who shares his twin daughters with Kim Porter, had to quickly accustom to being their main support back in 2018 when Porter died after a bout of lobar pneumonia. Georgia Slater,, 16 May 2022 Diddy, who shares his twin daughters with ex-girlfriend Kim Porter, had to quickly accustom to being their main support back in 2018 when Porter died after a bout of lobar pneumonia. Hattie Lindert,, 11 Apr. 2022 The muggy heat of Texas imitated that of mid-July Tokyo while the congested schedule allowed players to accustom themselves to the exhaustion of a tournament’s quick turnarounds. Julia Poe,, 17 June 2021 Then begin to gradually accustom your pet to your absence. Kim Campbell Thornton, Star Tribune, 23 Apr. 2021 In order to accustom the public to the new meter, the French government distributed leaflets, posters, and conversion tables. National Geographic, 10 Sep. 2020 Parents and caregivers should accustom themselves to always checking vehicles before locking the doors. Marc Ramirez, Dallas News, 22 Aug. 2020 When the pup was three weeks old, he was introduced to live fish to accustom him to seals' natural diets. Meg Jones, Milwaukee Journal Sentinel, 8 July 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'accustom.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


Middle English acustomen "to habituate (reflexive or intransitive)," borrowed from Anglo-French acustumer, acostumer, from a-, prefix forming transitive verbs (going back to Latin ad- ad-) + -customer, costomer, verbal derivative of custume custom entry 1

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of accustom was in the 15th century

Dictionary Entries Near accustom

Cite this Entry

“Accustom.” Dictionary, Merriam-Webster, Accessed 27 Jan. 2023.

Kids Definition


ac·​cus·​tom ə-ˈkəs-təm How to pronounce accustom (audio)
: to make familiar

More from Merriam-Webster on accustom

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
True or False

Test your knowledge - and maybe learn something along the way.

Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?