Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Medical Dictionary

1

invalid

play
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·va·lid

Medical Definition of invalid

  1. :  one who is sickly or disabled




3

invalid

play
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>





Seen and Heard

What made you want to look up invalid? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 8, 2016

to clear from accusation or blame

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift pince-nez kittly-benders duvet
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ