American Dictionary

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Definition invalid in American English

invalid noun

[countable] noun
/ˈɪnvəlɪd/
1

someone who is sick or injured and is unable to take care of themselves

Example

He had been an invalid for many years.

Synonyms and related words
1.1

relating to someone who is sick or injured, especially permanently

Example

He lives with his invalid mother.

Synonyms and related words
Definition invalid in American English