In*cer"tain\, n. [Pref. in- not + certain: cf. F. incertain, L. incertus. See Certain.] Uncertain; doubtful; unsteady. -- In*cer"tain*ly, adv. Very questionable and of uncertain truth. --Sir T. Browne.
lacking or indicating lack of confidence or assurance; "uncertain of his convictions"; "unsure of himself and his future"; "moving with uncertain (or unsure) steps"; "an uncertain smile"; "touched the ornaments with uncertain fingers" [syn: uncertain] [ant: certain]