- feeble or weak in body or health, especially because of age; ailing.
- unsteadfast, faltering, or irresolute, as persons or the mind; vacillating: infirm of purpose.
- not firm, solid, or strong: an infirm support.
- unsound or invalid, as an argument or a property title.
- to invalidate.
Origin of infirm
Synonyms for infirm
Antonyms for infirm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- weak in health or body, esp from old age
- (as collective noun; preceded by the)the infirm
- lacking moral certainty; indecisive or irresolute
- not stable, sound, or securean infirm structure; an infirm claim
- law (of a law, custom, etc) lacking legal force; invalid
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
Online Etymology Dictionary, © 2010 Douglas Harper
- Weak in body, especially from old age or disease; feeble.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.