confidence UK /ˈkɒn.fɪ.dəns/US /ˈkɑn.fɪ.dəns/ noun4 •A feeling of certainty; firm trust or belief; faith.She had confidence it would soon end.I reposed a great deal of confidence in his judgment. •the feeling that a person has when they are sure of themselves and what they can doHe entered the ring with confidence. •Information held in secret; a piece of information shared but to thence be kept in secret. •(old-fashioned) Boldness; presumption. formsconfidences