(1) Confidence in sb/sth (a feeling of trust or a state of confident hopefulness): I have confidence in our team.’ ‘The investors have lost confidence in the major stock markets.’ (2) Belief in own self and abilities: ‘She lost her confidence after the failure.’ (3) A trustful relationship: ‘He took me into his confidence.’
Confident about sth: ‘He is confident of success in the race.’