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OK Boomer can be perceived as pejorative, but it is mostly considered to be _____

Origin of invalid

1635–45; < French invalide < Latin invalidus weak. See in-3, valid

Definition for invalid (2 of 2)

[ in-val-id ]
/ ɪnˈvæl ɪd /


not valid; without force or foundation; indefensible.
deficient in substance or cogency; weak.
void or without legal force, as a contract.

Origin of invalid

1625–35; < Medieval Latin invalidus, Latin: weak; see invalid1


in·val·id·ly, adverbin·val·id·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for invalid

British Dictionary definitions for invalid (1 of 2)

/ (ˈɪnvəˌliːd, -lɪd) /


  1. a person suffering from disablement or chronic ill health
  2. (as modifier)an invalid chair


suffering from or disabled by injury, sickness, etc

verb (tr)

to cause to become an invalid; disable
(usually foll by out; often passive) mainly British to require (a member of the armed forces) to retire from active service through wounds or illness

Derived forms of invalid

invalidity, noun

Word Origin for invalid

C17: from Latin invalidus infirm, from in- 1 + validus strong

usage for invalid

It is best to avoid using the term invalid when referring to people with chronic illnesses or disabilities

British Dictionary definitions for invalid (2 of 2)

/ (ɪnˈvælɪd) /


not valid; having no cogency or legal force
logic (of an argument) having a conclusion that does not follow from the premises: it may be false when the premises are all true; not valid

Derived forms of invalid

invalidity (ˌɪnvəˈlɪdɪtɪ) or invalidness, nouninvalidly, adverb

Word Origin for invalid

C16: from Medieval Latin invalidus without legal force; see invalid 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for invalid

[ ĭnvə-lĭd ]


One who is incapacitated by a chronic illness or disability.


Incapacitated by illness or injury.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.