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WordReference Random House Learner's Dictionary of American English © 2024in•va•lid1 /ˈɪnvəlɪd/USA pronunciation n. [countable]- an unhealthy person, esp. one who is too sick or weak to care for himself or herself.
adj. - unable to care for oneself, as through ill health.
- of or for invalids.
v. [~ + object] - to make (someone) an invalid.
- Military[Chiefly Brit.]to evacuate (military personnel) from an area of fighting because of injury or illness.
in•val•id2 /ɪnˈvælɪd/USA pronunciation adj. - not valid; without force or a firm foundation;
that cannot be defended;
weak in logic:an invalid conclusion. - empty or without legal force:The contract was declared invalid.
in•va•lid•i•ty /ˌɪnvəˈlɪdɪti/USA pronunciation n. [uncountable] WordReference Random House Unabridged Dictionary of American English © 2024in•va•lid1 (in′və lid; Brit. in′və lēd′),USA pronunciation n. - an infirm or sickly person.
- a person who is too sick or weak to care for himself or herself:My father was an invalid the last ten years of his life.
- [Archaic.]a member of the armed forces disabled for active service.
adj. - unable to care for oneself due to infirmity or disability:his invalid sister.
- of or for invalids:invalid diets.
- (of things) in poor or weakened condition:the invalid state of his rocking chair.
v.t. - to affect with disease;
make an invalid:He was invalided for life. - to remove from or classify as not able to perform active service, as an invalid.
- Military[Brit.]to remove or evacuate (military personnel) from an active theater of operations because of injury or illness.
v.i. Archaic. - to become an invalid.
- Latin invalidus weak. See in-3, valid
- French invalide
- 1635–45
- not valid;
without force or foundation;
indefensible. - deficient in substance or cogency;
weak. - void or without legal force, as a contract.
- Medieval Latin invalidus, Latin: weak; see invalid1
- 1625–35
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