invalid
in‧val‧id1 /ɪnˈvæləd, ɪnˈvælɪd/ 
adjective1. a contract, ticket, claim etc that is invalid is not legally or officially acceptable
OPP valid:
Without the right date stamped on it, your ticket will be invalid.
2. an argument, reason etc that is invalid is not based on true facts or clear ideas, and lacks good judgment
OPP valid
3. if something you type into a computer is invalid, the computer does not recognize or accept it:
Filename in invalid format.
in‧va‧lid2 /ˈɪnvəliːd, -ləd $ -ləd/ noun [countable]someone who cannot look after themselves because of illness, old age, or injury:
I resented being treated as an invalid.
—invalid adjective [only before noun]
in‧va‧lid3 verb
be invalided out (also be invalided home) phrasal verb British English
to have to leave the army, navy etc because you are ill or injured
| I |
adjective1. a contract, ticket, claim etc that is invalid is not legally or officially acceptable OPP valid:
2. an argument, reason etc that is invalid is not based on true facts or clear ideas, and lacks good judgment
OPP valid
3. if something you type into a computer is invalid, the computer does not recognize or accept it:
| II |
noun [countable]someone who cannot look after themselves because of illness, old age, or injury: —invalid adjective [only before noun]
| III |
verbbe invalided out (also be invalided home) phrasal verb British English
to have to leave the army, navy etc because you are ill or injured