(1):

(v. t.) To thrash in the chaff; also, to cleanse or sift, as barley.

(2):

(v. t.) To utter with hesitation, or in a broken, trembling, or weak manner.

(3):

(v. i.) Hesitation; trembling; feebleness; an uncertain or broken sound; as, a slight falter in her voice.

(4):

(v. & n.) To hesitate; to speak brokenly or weakly; to stammer; as, his tongue falters.

(5):

(v. & n.) To tremble; to totter; to be unsteady.

(6):

(v. & n.) To hesitate in purpose or action.

(7):

(v. & n.) To fail in distinctness or regularity of exercise; - said of the mind or of thought.