vegetation, flora, botany -- (all the plant life in a particular region or period; "Pleistocene vegetation"; "the flora of southern California"; "the botany of China")
vegetation -- (the process of growth in plants)
vegetation -- (an abnormal growth or excrescence (especially a warty excrescence on the valves of the heart))
vegetation -- (inactivity that is passive and monotonous, comparable to the inactivity of plant life; "their holiday was spent in sleep and vegetation")