invalid

adjective (1)
in·​val·​id | \ (ˌ)in-ˈva-ləd How to pronounce invalid (audio) \

Definition of invalid

 (Entry 1 of 4)

: not valid:
a : being without foundation or force in fact, truth, or law an invalid assumption declared the will invalid
b : logically inconsequent

invalid

noun
in·​va·​lid | \ ˈin-və-ləd How to pronounce invalid (audio) , British usually -ˌlēd \

Definition of invalid (Entry 2 of 4)

: one who is sickly or disabled

invalid

verb
in·​va·​lid | \ ˈin-və-ləd How to pronounce invalid (audio) , -ˌlid, British usually -ˌlēd or ˌin-və-ˈlēd \
invalided; invaliding; invalids

Definition of invalid (Entry 3 of 4)

transitive verb

1 : to remove from active duty by reason of sickness or disability
2 : to make sickly or disabled

invalid

adjective (2)
in·​va·​lid | \ ˈin-və-ləd How to pronounce invalid (audio) , British usually -ˌlēd \

Definition of invalid (Entry 4 of 4)

1 : suffering from disease or disability : sickly
2 : of, relating to, or suited to one that is sick an invalid chair

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Other Words from invalid

Adjective (1)

invalidly \ (ˌ)in-​ˈva-​ləd-​lē How to pronounce invalid (audio) \ adverb

Synonyms & Antonyms for invalid

Synonyms: Adjective (1)

Synonyms: Adjective (2)

Antonyms: Adjective (1)

Antonyms: Adjective (2)

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Examples of invalid in a Sentence

Noun Her husband has become an invalid.

First Known Use of invalid

Adjective (1)

1542, in the meaning defined above

Noun

1701, in the meaning defined above

Verb

1787, in the meaning defined at sense 1

Adjective (2)

1642, in the meaning defined at sense 1

History and Etymology for invalid

Adjective (1)

Latin invalidus weak, from in- + validus strong — more at valid

Adjective (2)

Latin & French; French invalide, from Latin invalidus

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Time Traveler for invalid

Time Traveler

The first known use of invalid was in 1542

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Cite this Entry

“Invalid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invalid. Accessed 18 Apr. 2021.

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More Definitions for invalid

invalid

noun

English Language Learners Definition of invalid

 (Entry 1 of 2)

: a person who needs to be cared for because of injury or illness

invalid

verb

English Language Learners Definition of invalid (Entry 2 of 2)

British : to release (someone) from active military service because of illness or injury

invalid

adjective
in·​val·​id | \ in-ˈva-ləd How to pronounce invalid (audio) \

Kids Definition of invalid

 (Entry 1 of 2)

: having no force or effect

invalid

noun
in·​va·​lid | \ ˈin-və-ləd How to pronounce invalid (audio) \

Kids Definition of invalid (Entry 2 of 2)

: a person suffering from sickness or disability

invalid

adjective
in·​va·​lid | \ ˈin-və-ləd, British usually -ˌlēd \

Medical Definition of invalid

 (Entry 1 of 3)

1 : suffering from disease or disability : sickly
2 : of, relating to, or suited to one that is sick an invalid chair

invalid

noun

Medical Definition of invalid (Entry 2 of 3)

: one who is sickly or disabled

invalid

transitive verb
in·​va·​lid | \ ˈin-və-ləd, -ˌlid, British usually -ˌlēd or ˌin-və-ˈlēd \

Medical Definition of invalid (Entry 3 of 3)

1 : to remove from active duty by reason of sickness or disability was invalided out of the army
2 : to make sickly or disabled a patient invalided by valvular disease

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invalid

adjective
in·​val·​id | \ in-ˈva-ləd How to pronounce invalid (audio) \

Legal Definition of invalid

: being without force or effect under the law declared the will invalid

Other Words from invalid

invalidly adverb

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Comments on invalid

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