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invalid

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adjective in·val·id \(ˌ)in-ˈva-ləd\

Definition of invalid

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

invalidly

play \(ˌ)in-ˈva-ləd-lē\ adverb

Origin and Etymology of invalid

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


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invalid

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

Definition of invalid

  1. 1 :  suffering from disease or disability :  sickly

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

Origin and Etymology of invalid

Latin & French; French invalide, from Latin invalidus


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invalid

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noun in·val·id \ˈin-və-ləd, British usually -ˌlēd\

Definition of invalid

  1. :  one who is sickly or disabled

Examples of invalid in a Sentence

  1. Her husband has become an invalid.

First Known Use of invalid

1701


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invalid

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

Definition of invalid

  1. transitive verb
  2. 1 :  to remove from active duty by reason of sickness or disability

  3. 2 :  to make sickly or disabled

First Known Use of invalid

1787


INVALID Defined for English Language Learners

invalid

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noun

Definition of invalid for English Language Learners

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

invalid

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verb

Definition of invalid for English Language Learners

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


INVALID Defined for Kids

1

invalid

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adjective in·val·id \in-ˈva-ləd\

Definition of invalid for Students

  1. :  having no force or effect


2

invalid

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noun in·va·lid \ˈin-və-ləd\

Definition of invalid for Students

  1. :  a person suffering from sickness or disability


Medical Dictionary

1

invalid

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

Medical Definition of invalid

  1. 1:  suffering from disease or disability :  sickly

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


2

invalid

noun in·val·id

Medical Definition of invalid

  1. :  one who is sickly or disabled


3

invalid

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

Medical Definition of invalid

  1. 1:  to remove from active duty by reason of sickness or disability was invalided out of the army

  2. 2:  to make sickly or disabled a patient invalided by valvular disease


Law Dictionary

invalid

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adjective in·val·id \in-ˈva-ləd\

Legal Definition of invalid

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

invalidly

adverb


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