Invaliding signifies the return home, or to a more healthy climate, of soldiers or sailors who have been rendered incapable of active duty by wounds or the severity of foreign service. The man invalided returns to his duty if his health is sufficiently restored to justify the step, otherwise he is discharged as 'medically unfit.'
Invaliding
Chambers's Encyclopaedia, Volume 6: Humber to Malta, p. 190
Source scan(s): p. 0201