'Fertilizer' definitions:

Definition of 'fertilizer'

From: WordNet
noun
Any substance such as manure or a mixture of nitrates used to make soil more fertile [syn: fertilizer, fertiliser, plant food]

Definition of 'Fertilizer'

From: GCIDE
  • Fertilizer \Fer"ti*lizer\, n.
  • 1. One who fertilizes; the agent that carries the fertilizing principle, as a moth to an orchid. --A. R. Wallace. [1913 Webster]
  • 2. That which renders fertile; a general name for commercial substances which make plants grow better, as manure, guano, phosphate of lime, ammonium nitrate, etc. [1913 Webster]