Engagement/ɪnˈɡeɪdʒmənt/ Definition 1 of 5Pro Tip 1/2Romantic Commitment Reflects a promise to marry, often with a sense of formality and celebration. Their engagement was followed by a festive party. Pro Tip 2/2Not Always Permanent Some engagements end without marriage, and the term can imply uncertainty. They called off their engagement after a year.