invalid

US /ɪnˈvæl.ɪd/
UK /ɪnˈvæl.ɪd/
"invalid" picture
1.

a person made weak or disabled by illness or injury

:
•
The nurse helped the invalid to sit up in bed.
•
He spent his last years as an invalid, confined to a wheelchair.
:
disabled personsick personinfirm personpatientconvalescent
1.

not valid; not effective or legally binding

:
•
The contract was declared invalid due to a technicality.
•
Your password is invalid. Please try again.
:
nullvoidunlawfulillegitimateunsound
:
valideffectivelegal
2.

not based on truth or fact; fallacious

:
•
His argument was dismissed as invalid.
•
The conclusion drawn from the flawed data was invalid.
:
fallaciousunsoundillogicaluntruefalse
:
validsoundlogicaltruefactual
:
invalidationinvalidate