flexitarian Pronunciation: /flɛksəˈtɛːrɪən/Definition of flexitarian noun a person who has a primarily vegetarian diet but occasionally eats meat or fish:in my close social circle I have a vegetarian, a pescatarian, and a flexitarian [as modifier]:a flexitarian dietOrigin: 1990s: blend of flexible and vegetarianflexitarian in other Oxford dictionaries Definition of flexitarian in the US English dictionary