Qua″ver, v. i. [imp. & p. p.Quavered (?); p. pr. & vb. n.Quavering.] [OE. quaven to shake, to tremble; cf. LG. quabbeln to shake, to be soft, of fat substances, quabbe a fat lump of flesh, a dewlap, D. kwabbe, and E. quiver, v.] 1. To tremble; to vibrate; to shake. Sir I. Newton.
2. Especially, to shake the voice; to utter or form sound with rapid or tremulous vibrations, as in singing; also, to trill on a musical instrument