Webster's 1913 Dictionary
OVERCONFIDENT
OVERCONFIDENT O "ver *con "fi *dent, a.
Defn: Confident to excess. -- O "ver *con "fi *dent *ly, adv.
New American Oxford Dictionary
overconfident
o ver con fi dent |ˌōvərˈkänfidənt ˈˌoʊvərˈkɑnfədənt | ▶adjective excessively or unreasonably confident: mistakes made through being overconfident. DERIVATIVES o ver con fi dence noun, o ver con fi dent ly adverb
Oxford Dictionary
overconfident
over |con ¦fi |dent |əʊvəˈkɒnfɪd (ə )nt | ▶adjective excessively confident. DERIVATIVES overconfidence noun, overconfidently adverb
American Oxford Thesaurus
overconfident
overconfident adjective her downfall came through being overconfident: cocksure, cocky, smug, conceited, self-assured, brash, blustering, overbearing, presumptuous, heading for a fall, riding for a fall; informal too big for one's britches /boots.
Oxford Thesaurus
overconfident
overconfident adjective her downfall came through being overconfident: cocksure, smug, conceited, self-assured, self-assertive, unabashed, brash, swaggering, blustering, overbearing, overweening, presuming, presumptuous, riding /heading for a fall, foolhardy; informal cocky, too big for one's boots; rare hubristic. ANTONYMS diffident, shy, unsure of oneself.
Sanseido Wisdom Dictionary
overconfident
ò ver c ó nfident 形容詞 自信過剰の, うぬぼれの強い .ò ver c ó n fi dence 名詞 ～ly 副詞
The Wordsmith Dictionary