- The definition of a flexitarian is someone who is mostly vegetarian, but occasionally eats meat.
A person who only eats vegetables but once a month eats a steak is an example of a flexitarian.
flexitarian definition by American Heritage Dictionary
One who normally maintains a vegetarian diet but occasionally makes exceptions and eats meat or fish.adjective
Of or relating to a diet that is primarily vegetarian but includes meat or fish on occasion.
Origin: flexi(ble) + (vege)tarian.