nouns
the trait of sincere and steadfast fixity of purpose
"a man of energy and commitment"
the act of binding yourself (intellectually or emotionally) to a course of action
"his long commitment to public service"; "they felt no loyalty to a losing team"
an engagement by contract involving financial obligation
"his business commitments took him to London"
is a type of (narrower)
the act of sharing in the activities of a group
"the teacher tried to increase his students' engagement in class activities"
a message that makes a pledge
the official act of consigning a person to confinement (as in a prison or mental hospital)