engagement

noun

1. An appointment, especially to speak or perform.
2. Connection or attachment.
3. The feeling of being compelled, drawn in, connected to what is happening, interested in what will happen next.
4. The period of time when marriage is planned or promised.
5. In any situation of conflict, an actual instance of active hostilities.
6. The point at which the fencers are close enough to join blades, or to make an effective attack during an encounter.
7. A performance metric representing an instance where a user interacts with some content after an impression.
8. The quantitative response to a piece of content or a service; attention.