1. (noun)vegetation, flora, botany all the plantlife in a particularregion or period "Pleistocene vegetation"; "the flora of southern California"; "the botany of China"
3. (noun)vegetation an abnormal growth or excrescence (especially a warty excrescence on the valves of the heart)
4. (noun)vegetation inactivity that is passive and monotonous, comparable to the inactivity of plantlife "their holiday was spent in sleep and vegetation"