What does fertilise mean?
Fertilise is a verb with two principal meanings that share a single idea: enabling growth and reproduction. In biology, it means to cause an egg or ovum to begin developing by uniting it with a sperm cell — the process known as fertilisation, which marks the starting point of new life in animals, plants, and humans alike. In agriculture and horticulture, it means to make soil more productive by adding nutrients such as compost, manure, or chemical fertilizer. The word carries no negative connotation; it is neutral, practical, and appears everywhere from school science lessons to farming manuals and fertility-clinic reports. Fertilise is the standard British spelling of the word, with fertilize preferred in American English, but the two are identical in meaning. Derived forms include fertilisation, fertiliser, and the adjective fertile at the root of the family. Its versatility across both the laboratory and the field makes it a quietly essential term in discussions of life, growth, and cultivation.
verbTo make fertile or productive, especially by adding nutrients to soil; also, to cause an egg or female reproductive cell to develop by introducing sperm.
- To introduce sperm into an egg so that it begins to develop (biology).
- To make soil or land fertile by adding nutrients (agriculture).
- To enrich or stimulate something figuratively.
"Farmers fertilise their fields in early spring to prepare the soil for planting."
"Only one sperm is needed to fertilise the egg."
"She fertilised the tomato beds with well-rotted compost before planting."
The same verb that describes bees pollinating flowers and farmers feeding crops also describes the very moment you began — one word spanning gardens and genesis.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fertilise
Fertilise derives from the Latin fertilis, meaning fruitful or productive, itself formed from ferre, to bear or carry. The word entered English via French in the seventeenth century as part of the broader vocabulary of agriculture and natural philosophy. Its cognates include fertile, fertility, and fertilizer, all drawing on the same Latin root that emphasises bearing fruit.
Related word forms
How fertilise is actually used
Fertilise follows standard British spelling conventions; American writing uses fertilize throughout. In scientific contexts the biological sense dominates, while the agricultural sense is common in gardening and farming language. The verb is neutral in register, appearing in both everyday and technical prose.
Easily confused with fertilise
Fertilise is the British spelling while fertilize is the American spelling; they mean exactly the same thing.