invalid

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in|va|lid (invalids)
The noun is pronounced /'ɪnvəlɪd/ The adjective is pronounced /ɪnv'ælɪd/and is hyphenated in|val|id.
1 [N-COUNT]
An invalid is someone who needs to be cared for because they have an illness or disability.
I hate being treated as an invalid.
2 [ADJ]
If an action, procedure, or document is invalid, it cannot be accepted, because it breaks the law or some official rule.
The trial was stopped and the results declared invalid...
3 [ADJ]
An invalid argument or conclusion is wrong because it is based on a mistake.
We think that those arguments are rendered invalid by the hard facts on the ground.

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