1. devote or dedicate oneself to sth
commit to a relationship/job/course
To 'commit' is a verb meaning to carry out or perform an act (usually one which is a crime or immoral). Commit can also mean to pledge or dedicate yourself to a particular course of action or behaviour. In a social context to 'commit' means to agree to be in a long term relationship with someone. In the context of law or medicine to 'commit' someone can mean to consign someone to prison or other residential services on reprimand or for long term treatment. You can also 'commit' something meaning to record it officially on paper or formally so it can be preserved for future access or reference.