any substance, such as manure or a mixture of nitrates, added to soil or water to increase its productivity an object or organism such as an insect that fertilizes an animal or plant
WordReference Random House Learner's Dictionary of American English © 2026
fer•ti•liz•er /ˈfɜrtəˌlaɪzɚ/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Agricultureany substance used to fertilize the soil.
fer•ti•liz•er
(fûr′tl ī′zər),USA pronunciation n.
- any substance used to fertilize the soil, esp. a commercial or chemical manure.
- a person, insect, etc., that fertilizes an animal or plant:Bees are fertilizers of flowers.
- fertilize + -er1 1655–65
Collins Concise English Dictionary © HarperCollins Publishers::
'fertiliser' also found in these entries (note: many are not synonyms or translations):