vegetation meaning
EN
[ˌvɛd͡ʒəˈteɪʃən] [-eɪʃən] 
US WVegetation
- Vegetation is assemblages of plant species and the ground cover they provide. It is a general term, without specific reference to particular taxa, life forms, structure, spatial extent, or any other specific botanical or geographic characteristics.
- Vegetation type' characteristic dominant species or species, or a common aspect of the assemblage, such as an elevation range or environmental commonality.
FR végétation 
- NounPLvegetationsSUF-ation
- (uncountable) Plants, taken collectively.
- As towns continue to grow, replanting vegetation has become a form of urban utopia and green roofs are spreading fast. Last year 1m square metres of plant-covered roofing was built in France, as much as in the US, and 10 times more than in Germany, the pioneer in this field. In Paris 22 hectares of roof have been planted, out of a potential total of 80 hectares.
- (pathology, countable) An abnormal verrucous or fibrinous growth.
- The act or process of vegetating, or growing as a plant does; vegetable growth.
- (uncountable) Plants, taken collectively.
- More Examples
- Used in the Middle of Sentence
- The vegetation was withered to pallid rags: even the tiniest weedling in the rock crevices had been poisoned by the devastating blast.
- The fontinal cliff vegetation occupies moist rocky banks, damp ledges, and dripping rocks.
- A few triaperturate pollen grains possibly belonging to Normapolles complex indicate that the vegetation from the Velaux region was probably composed of both gymnosperms (Coniferales) and angiosperms.
- Used in the Middle of Sentence
Definition of vegetation in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Singularia tantum
- Uncountable nouns
- Uncountable nouns
- Countable nouns
- Nouns
Source: Wiktionary
Grammatically, this word "vegetation" is a noun, more specifically, a countable noun and a singularia tantum.