Feeble/ˈfiːbl/ Definition 1 of 3Pro Tip 1/3Physical Actions Use 'feeble' when describing movements or actions that lack strength or power. After the hike, he gave a feeble wave and collapsed. Pro Tip 2/3Not Convincing 'Feeble' often indicates that an effort or argument is not persuasive or impressive. The lawyer's feeble defense did not convince the jury. Pro Tip 3/3Emotional Weakness Can describe someone's emotional state as lacking force or enthusiasm. His smile was feeble, betraying his sadness.