1. a promise or firm decision to do something
2. dedication to a cause, activity, or relationship; willingness to give your time and energy to something
3. an engagement or obligation that restricts freedom of action

Examples

• She made a commitment to exercise every day.
• His commitment to the project impressed his colleagues.
• The company’s commitment to environmental protection is evident in their policies.
• I can’t go out tonight because I have other commitments.
• Their commitment to each other lasted fifty years.
• The job requires a two-year commitment.
• Her commitment to helping others led her to volunteer regularly.