fertilise v 1: make fertile or productive; "The course fertilized her imagination" [syn: {fertilize}, {fecundate}, {fertilise}] 2: provide with fertilizers or add nutrients to; "We should fertilize soil if we want to grow healthy plants" [syn: {fertilize}, {fertilise}, {feed}] 3: introduce semen into (a female) [syn: {inseminate}, {fecundate}, {fertilize}, {fertilise}]