Not fertile; not productive; barren; sterile; unable to propagate its kind; as, an infertile soil; an infertile hybrid; -- of living things and of soil or land.

the inability to produce offspring because of some disorder of the reproductive system.

Not fertile or productive; sterile: incapable of reproducing.

Incapable of sexual reproduction.

Unable to have children.

incapable of reproducing; "an infertile couple"

Incapable of initiating, sustaining, or supporting reproduction, alternatively: not fertilised and therefore incapable of growing and developing.

Unfertilized by sperm. Hummingbird females sometimes lay infertile eggs that will not hatch. May also refer to a female unable to produce ova.

Incapable of producing a fertilized egg, as a laying worker.

Not able to conceive after a year of regular intercourse without contraception. See the entire definition of Infertile

people who are unable to have a baby are described as infertile. A man may be producing sperm that are not healthy enough to fertilise an egg, or a woman may not be producing an egg each month, or the tubes that sperm and eggs travel down can be blocked or damaged. This is often caused by genital infections ( STIs) so it is important for people to have STI checks if they are sexually active.

someone who is unable to conceive (get pregnant)/or get someone pregnant.

An egg that is not fertilized, will not hatch.

Unable to produce children.

Physically incapable of conceiving children.