1 [U]: commitment (to sth) being prepared to give a lot of your time and attention to sth because you believe it is right or important （将时间、精力等）集中投入，投注: I admire Gary's commitment to protecting the environment. 我很赞赏加里对保护环境的献身精神。

2 [C,U] a promise or agreement to do sth; a responsibility 承诺；责任: When I make a commitment I always stick to it. 一旦作出承诺，我总能信守。Helen now works fewer hours because of family commitments. 因为要照顾家庭，海伦现已缩短了工作时间。