| Noun | 1. | fertility - the ratio of live births in an area to the population of that area; expressed per 1000 population per yearrate - a magnitude or frequency relative to a time unit; "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected" | |
| 2. | fertility - the state of being fertile; capable of producing offspringinfertility, sterility - the state of being unable to produce offspring; in a woman it is an inability to conceive; in a man it is an inability to impregnate | |
| 3. | fertility - the property of producing abundantly and sustaining growth; "he praised the richness of the soil" | |