invalid


1in·val·id

adjective \(ˌ)in-ˈva-ləd\

Definition of INVALID

:  not valid:
a :  being without foundation or force in fact, truth, or law <an invalid assumption> <declared the will invalid>
b :  logically inconsequent
in·val·id·ly \-lē\ adverb

Origin of INVALID

Latin invalidus weak, from in- + validus strong — more at valid
First Known Use: 1542

Rhymes with INVALID

2in·va·lid

adjective \ˈin-və-ləd, British usually -ˌlēd\

Definition of INVALID

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

Origin of INVALID

Latin & French; French invalide, from Latin invalidus
First Known Use: 1642

Other Medicine Terms

analgesia, angina, diabetes, hepatitis, homeopathy, logorrhea, palliate, pandemic

3invalid

noun \same as 2\

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

Full Definition of INVALID

:  one who is sickly or disabled

Examples of INVALID

  1. Her husband has become an invalid.

First Known Use of INVALID

1701

Other Medicine Terms

analgesia, angina, diabetes, hepatitis, homeopathy, logorrhea, palliate, pandemic

4in·va·lid

verb \ˈin-və-ləd, -ˌlid, British usually -ˌlēd or ˌin-və-ˈlēd\

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

Full Definition of INVALID

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

First Known Use of INVALID

1787

Other Medicine Terms

analgesia, angina, diabetes, hepatitis, homeopathy, logorrhea, palliate, pandemic

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