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[roi-ster] /ˈrɔɪ stər/
verb (used without object)
to act in a swaggering, boisterous, or uproarious manner.
to revel noisily or without restraint.
Origin of roister
1545-55; v. use of roister (noun) < Middle French ru(i)stre ruffian, boor, variant of ru(i)ste rustic
Related forms
roisterer, noun
roisterous, adjective
roisterously, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for roister
Historical Examples
  • His very roistering became a pose, and his vanity made him roister the more, to make the pose more convincing.

    The House with the Green Shutters

    George Douglas Brown
  • roister Doister opens the moveable scenery of domestic life in the metropolis—touched with care, and warm with reality.

    Amenities of Literature

    Isaac Disraeli
British Dictionary definitions for roister


verb (intransitive)
to engage in noisy merrymaking; revel
to brag, bluster, or swagger
Derived Forms
roisterer, noun
roisterous, adjective
roisterously, adverb
Word Origin
C16: from Old French rustre lout, from ruste uncouth, from Latin rusticus rural; see rustic
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
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Word Origin and History for roister

"bluster, swagger, be bold, noisy, vaunting, or turbulent," 1580s, from an obsolete noun roister "noisy bully" (1550s, displaced by 19c. by roisterer), from Middle French ruistre "ruffian," from Old French ruiste "boorish, gross, uncouth," from Latin rusticus (see rustic (adj.)). Related: Roistered; roistering. Ralph Royster-Doyster is the title and lead character of what is sometimes called the first English comedy (Udall, 1555).

Online Etymology Dictionary, © 2010 Douglas Harper
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