{S/MB / Roleplay /Minor Shit-Posting} 🅰🅳🆅🅴🅽🆃🆄🆁🅴 [ad-ven-cher] noun an exciting or very unusual experience. participation in exciting undertakings or enterprises: the spirit of adventure. Definition of adventure a bold, usually risky undertaking; hazardous action of uncertain outcome. a commercial or financial speculation of any kind; venture. Obsolete. peril; danger; risk. chance; fortune; luck. verb (used with object), ad·ven·tured, ad·ven·tur·ing. to risk or hazard. to take the chance of; dare. to venture to say or utter: to adventure an opinion. verb (used without object), ad·ven·tured, ad·ven·tur·ing. to take the risk involved. to venture; hazard.