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feeling or showing confidence in oneself; self-assured:

〈人･態度などが〉自信にあふれた, 大胆な; 〈人が〉 «…について» 自信を持っている «about, in, of»

e.g. we require outgoing, confident people able to approach large groups

e.g. a confident smile.

feeling or showing certainty about something:

〈人が〉 «…を/…ということを» 確信している «about, of/that節» (!強い確信を表す)

e.g. this time they're confident of a happy ending

e.g. I am not very confident about tonight's game.

noun archaic

a confidant.

｟古｠ 親友, 腹心の友(confidant)

late 16th century: from French confident(e), from Italian confidente, from Latin confident- ‘having full trust’, from the verb confidere, from con- (expressing intensive force) + fidere ‘trust’.