invalid

adjective (1)

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in·val·id | \ (ˌ)in-ˈva-ləd

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

, British usually -ˌlēd \

Definition of invalid (Entry 2 of 4)

: one who is sickly or disabled

invalid

verb

in·va·lid | \ ˈin-və-ləd

, -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

, British usually -ˌlēd \

Definition of invalid (Entry 4 of 4)

1 : affected by disease or disability : sickly

2 : of, relating to, or suited to one that is sick an invalid chair

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Synonyms & Antonyms for invalid

Synonyms: Adjective (1)

Synonyms: Adjective (2)

Antonyms: Adjective (1)

Antonyms: Adjective (2)

healthy,
well

Examples of invalid in a Sentence

Noun Her husband has become an invalid.

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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

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Dictionary Entries Near invalid

invagination

invalid

invalidate

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Cite this Entry

“Invalid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/invalid. Accessed 26 May. 2022.

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More Definitions for invalid

invalid

adjective

in·val·id | \ in-ˈva-ləd

Kids Definition of invalid

(Entry 1 of 2)

: having no force or effect

invalid

noun

in·va·lid | \ ˈin-və-ləd

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 : affected by 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

invalid

adjective

in·val·id | \ in-ˈva-ləd

Legal Definition of invalid

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

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invalid

Definition of invalid

Other Words from invalid

Synonyms & Antonyms for invalid

Examples of invalid in a Sentence

First Known Use of invalid

History and Etymology for invalid

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Kids Definition of invalid

Medical Definition of invalid