Definition of roil

• v. - To render turbid by stirring up the dregs or sediment of; as, to roil wine, cider, etc. , in casks or bottles; to roil a spring.
• v. - To disturb, as the temper; to ruffle the temper of; to rouse the passion of resentment in; to perplex.
• v. i. - To wander; to roam.
• v. i. - To romp.