The Collaborative International Dictionary of English v.0.48:

Confident \Con"fi*dent\, n.
   See Confidant. --South. --Dryden.
   [1913 Webster]

WordNet (r) 3.0 (2006):

confident
    adj 1: having or marked by confidence or assurance; "a confident
           speaker"; "a confident reply"; "his manner is more
           confident these days"; "confident of fulfillment" [ant:
           diffident, shy, timid, unsure]
    2: persuaded of; very sure; "were convinced that it would be to
       their advantage to join"; "I am positive he is lying"; "was
       confident he would win" [syn: convinced(p), positive(p),
       confident(p)]
    3: not liable to error in judgment or action; "most surefooted
       of the statesmen who dealt with the depression"- Walter
       Lippman; "demonstrates a surefooted storytelling talent"-
       Michiko Kakutani [syn: confident, surefooted, sure-
       footed]

Moby Thesaurus II by Grady Ward, 1.0:

123 Moby Thesaurus words for "confident":
   agape, agog, all agog, anticipant, anticipating, anticipative,
   anticipatory, arrogant, aspiring, assured, awaiting, aweless,
   balanced, believing, bold, brash, brave, certain, cocksure, cocky,
   collected, composed, convinced, cool, courageous, dauntless,
   decided, determined, devout, dogmatic, doubtless, dreadless, eager,
   equanimous, equilibrious, expectant, expecting, faithful, fearless,
   fideistic, fond, forearmed, forestalling, forewarned, full of hope,
   gaping, hopeful, hoping, hubristic, impressed with,
   in anticipation, in expectation, in good heart, in hopes, intrepid,
   levelheaded, looking for, looking forward to, not surprised,
   of good cheer, of good hope, optimistic, overconfident, oversure,
   overweening, perky, persuaded, pietistic, pious, pistic, poised,
   pompous, positive, prepared, presuming, proud, pushful, pushy,
   ready, reassured, recollected, reliant, sanguine, satisfied,
   secure, self-assertive, self-assured, self-confident,
   self-controlled, self-important, self-possessed, self-reliant,
   self-restrained, sold on, sure, together, unafraid, unapprehensive,
   unbashful, undaunted, under the impression, undespairing,
   undiffident, undoubtful, undoubting, unfaltering, unfearful,
   unfearing, unfrightened, unhesitating, unscared, unshy,
   unsurprised, unterrified, untimid, untimorous, unwavering, uppity,
   valiant, waiting, waiting for, watching for, well-balanced