roister definition by Webster's New World
- to boast or swagger
- to be lively and noisy; revel boisterously
Origin: ; from earlier roister (n.), loud bully ; from Old French ruistre ; from Classical Latin rusticus: see rustic
roister definition by American Heritage Dictionary
intransitive verb rois·tered, rois·ter·ing, rois·ters
- To engage in boisterous merrymaking; revel noisily.
- To behave in a blustering manner; swagger.
Origin: From obsolete roister, roisterer, probably from Old French rustre, ruffian, alteration of ruste, from Latin rūsticus, rustic; see rustic.
- roisˈter·er noun
- roisˈter·ous adjective
- roisˈter·ous·ly adverb