Open English Wordnet
Nouns
(n)vegetation, flora, botanyall the plant life in a particular region or period“Pleistocene vegetation”, “the flora of southern California”, “the botany of China”
(n)vegetationan abnormal growth or excrescence (especially a warty excrescence on the valves of the heart)
(n)vegetationinactivity that is passive and monotonous, comparable to the inactivity of plant life“their holiday was spent in sleep and vegetation”