The state of being infirm; feebleness; an imperfection or weakness; esp., an unsound, unhealthy, or debilitated state; a disease; a malady; as, infirmity of body or mind.

A personal frailty or failing; foible; eccentricity; a weakness or defect.

the state of being weak in health or body (especially from old age)

Any omission in detail whose effect is to invalidate a transfer of title. Infirmities include; lack of endorsement, conflicting written and numerical amounts and signature not present.