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[C or U] when you are willing to give your time and energy to something that you believe in, or a promise or firm decision to do somethingher commitment to left-wing politics/the cause of feminism/the company
She is known chiefly for her commitment to nuclear disarmament.
I'd like to thank the staff for having shown such commitment.
Try the product out in the comfort of your own home with absolutely no commitment to buy!
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[C] something that you must do or deal with that takes your timefamily/work commitments
I've got too many commitments at the moment to do an evening class.
Children are such a commitment.