Engagement
Part of speech: noun
Definition: an appointment, especially to speak or perform connection or attachment (countable or uncountable) the period of time when marriage is planned or promised the point at which the fencers are close enough to join blades, or to make an effective attack during an encounter In air defense, an attack with guns or air-to-air missiles by an interceptor aircraft, or the launch of an air defense missile by air defense artillery and the missile's subsequent travel to intercept. (JP 1-02 Department of Defense Dictionary of Military and Associated Terms). A tactical conflict, usually between opposing lower echelons maneuver forces. (JP 1-02 Department of Defense Dictionary of Military and Associated Terms). In naval parlance, the use of a munition, weapon or decoy to carry out an offensive or defensive action. In any situation of conflict, an actual instance of active hostilities.
Example sentence: I think happiness is a combination of pleasure, engagement and meaningfulness.
Betrothal
Part of speech: noun
Definition: The act of betrothing, or the fact of being betrothed; a mutual promise, engagement, or contract for a future marriage between the persons betrothed; betrothment; affiance.