Definitions of commitment:

• noun:   the official act of consigning a person to confinement (as in a prison or mental hospital)
• noun:   the act of binding yourself (intellectually or emotionally) to a course of action

  Example: "His long commitment to public service"

• noun:   an engagement by contract involving financial obligation

  Example: "His business commitments took him to London"

• noun:   a message that makes a pledge
• noun:   the trait of sincere and steadfast fixity of purpose

  Example: "A man of energy and commitment"