fertilize

verb

fer·​til·​ize ˈfər-tə-ˌlīz 

fertilized; fertilizing

transitive verb

: to make fertile: such as

a

: to apply a fertilizer to

fertilize land

b

: to cause the fertilization of

fertilizable

ˈfər-tə-ˌlī-zə-bəl 

adjective

Examples of fertilize in a Sentence

A single sperm fertilizes an egg.

Bees fertilize plants as they collect nectar from flowers.

He fertilizes the lawn every year.

The soil is so rich there is no need to fertilize.

Recent Examples on the Web

Let the Clippings Fall Save time and fertilize your turf at the same time by leaving clippings on the lawn. —Megan Hughes, Better Homes & Gardens, 24 May 2026

Also, make sure the ligustrum trees remain moist, and fertilize with a slow-release landscape product two to three times a year. —Tom MacCubbin, The Orlando Sentinel, 23 May 2026

Some roses require regular spraying and fertilizing to look their best; all require sunshine, good drainage, and soil rich in organic matter. —Brandee Gruener, Southern Living, 21 May 2026

Following the procedure, medical professionals will fertilize the eggs with sperm. —Amaris Encinas, USA Today, 19 May 2026

Word History

First Known Use

1621, in the meaning defined above

Phrases Containing fertilize

• cross-fertilize

Rhymes for fertilize

• advertise
• aggrandize
• alibis
• alkalies
• alkalis
• amortize
• amplifies
• analyse
• analyze
• anywise
• authorize
• butterflies

Kids Definition

fertilize

verb

fer·​til·​ize ˈfərt-ᵊl-ˌīz 

fertilized; fertilizing

: to make fertile: as

a

: to cause the fertilization of

also : to unite with in the process of fertilization

a sperm fertilizes an egg

b

: to apply a fertilizer to

fertilize land