To be unsteady; tremble; totter: as, his legs falter.To fail in accuracy, distinctness, or regularity of exercise or function; fail or waver from physical or moral weakness, emotion, etc.To hesitate, especially to hesitate in the utterance of words; speak with a broken or trembling utterance; stammer: as, his tongue falters.Synonyms Stutter, etc. See stammer.n. The act of faltering, hesitating, trembling, stammering, or the like; unsteadiness; hesitation; trembling; quavering.To thresh in the chaff; cleanse or sift out, as barley.