[ in-furm ]
See synonyms for: infirminfirmness on

  1. feeble or weak in body or health, especially because of age; ailing.

  2. unsteadfast, faltering, or irresolute, as persons or the mind; vacillating: infirm of purpose.

  1. not firm, solid, or strong: an infirm support.

  2. unsound or invalid, as an argument or a property title.

verb (used with object)
  1. to invalidate.

Origin of infirm

1325–75; Middle English infirme<Latin infirmus.See in-3, firm1

Other words for infirm

Opposites for infirm

Other words from infirm

  • in·firm·ly, adverb
  • in·firm·ness, noun

Words Nearby infirm Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use infirm in a sentence

British Dictionary definitions for infirm


/ (ɪnˈfɜːm) /

    • weak in health or body, esp from old age

    • (as collective noun; preceded by the): the infirm

  1. lacking moral certainty; indecisive or irresolute

  1. not stable, sound, or secure: an infirm structure; an infirm claim

  2. law (of a law, custom, etc) lacking legal force; invalid

Derived forms of infirm

  • infirmly, adverb
  • infirmness, noun

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