1

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 invalid> b :  logically inconsequent

invalidly

play \-lē\ adverb

Origin and Etymology of invalid

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


First Known Use: 1542


2

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


First Known Use: 1642


3

invalid

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noun in·val·id \same as 2\

Definition of invalid

  1. :  one who is sickly or disabled

Examples of invalid in a sentence

  1. Her husband has become an invalid.

1701

First Known Use of invalid

1701


4

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

1787

First Known Use of invalid

1787


INVALID Defined for English Language Learners


3

invalid

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noun in·val·id \same as 2\

Definition of invalid for English Language Learners

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


4

invalid

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

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

play play
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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