adjective, fee·bler, fee·blest.
- physically weak, as from age or sickness; frail.
- weak intellectually or morally: a feeble mind.
- lacking in volume, loudness, brightness, distinctness, etc.: a feeble voice; feeble light.
- lacking in force, strength, or effectiveness: feeble resistance; feeble arguments.
- lacking in physical or mental strength; frail; weak
- inadequate; unconvincingfeeble excuses
- easily influenced or indecisive
late 12c., from Old French feble (12c., Modern French faible) “weak, feeble,” from Latin flebilis “lamentable,” literally “that is to be wept over,” from flere “weep, cry, shed tears, lament,” from PIE *bhle- “to howl” (cf. bleat). The first -l- was dropped in Old French by dissimilation. The noun meaning “feeble person” is recorded from mid-14c.