Lack of validity or cogency; lack of legal force or efficacy; invalidness; as, the invalidity of an agreement or of a will.

Lack of health; infirmity.

illogicality as a consequence of having a conclusion that does not follow from the premisses

Sickness. (H)

Being too ill or disabled to work

Social security term for physical or mental disability.

Illness.

A procedure to have a trade mark registration removed on the grounds that the mark did not qualify for registration and should have been refused registration on either absolute grounds or relative grounds.