intoxicant(noun, adjective) adjective1. causing intoxication- an intoxicating drinkSimilar word(s): alcoholic, intoxicating noun1. a liquor or brew containing alcohol as the active agentSimilar word(s): alcohol, inebriantDefinition categories: food, beverage, drink, drinkable, potable2. a drug that can produce a state of intoxicationDefinition categories: man–made, drug