from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Weak in body, especially from old age or disease; feeble. See Synonyms at weak.
- adj. Lacking firmness of will, character, or purpose; irresolute.
- adj. Not strong or stable; shaky: an infirm support.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Weak or ill, not in good health.
- adj. insecure; irresolute
- adj. frail; unstable
- v. To contradict, to provide proof that something is not.
from the GNU version of the Collaborative International Dictionary of English
- adj. Not firm or sound; weak; feeble
- adj. Weak of mind or will; irresolute; vacillating.
- adj. Not solid or stable; insecure; precarious.
- transitive v. To weaken; to enfeeble.
from The Century Dictionary and Cyclopedia
- Not firm, stable, or strong; lacking stability or solidity; faltering; feeble: as, an infirm support; an infirm judgment.
- Specifically Not sound in health; impaired in health or vitality; enfeebled; weak: as, infirm in body or constitution.
- Voidable; obnoxious to legal objection that may destroy apparent efficacy.
- To weaken; enfeeble.
- To make less firm or certain; render doubtful, questionable, or dubious.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. lacking bodily or muscular strength or vitality
- adj. lacking firmness of will or character or purpose
Middle English infirme, from Old French, from Latin īnfirmus : in-, not; see in-1 + firmus, strong, firm; see dher- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)