definition of
fertility

[1] #1 fertility n. [birthrate, birth rate, fertility rate, natality] the ratio of live births in an area to the population of that area; expressed per 1000 population per year. wn

[2] #2 fertility n. [fecundity] the state of being fertile; capable of producing offspring. wn

[3] #3 fertility n. [richness, rankness, prolificacy] the property of producing abundantly and sustaining vigorous and luxuriant growth; "he praised the richness of the soil"; "weeds lovely in their rankness". wn