WordWeb Online

1. Pathetically lacking in force or effectiveness
   "a feeble excuse";
   - lame, wussy [informal]
    
2. Lacking strength or vigour
   "feeble efforts"; "a feeble voice";
   - faint
    
3. Lacking bodily or muscular strength or vitality
   "a feeble old woman";
   - decrepit, debile [archaic], infirm, rickety, sapless, weak, weakly
    
4. Lacking strength
   "a weak, feeble fool, devoid of energy and promptitude";
   - nerveless

Derived forms: feebler, feeblest

See also: frail, powerless, weak

Encyclopedia: Feeble