en·gage·ment 
(ĕn-gājmənt)
(ĕn-gājmənt)n.
1.
a. The action of engaging or the state of being engaged: engagement in diplomacy.
b. The condition of being in gear: engagement of the transmission.
2.
a. A mutual promise to get married.
b. The period during which this promise is kept: a long engagement.
3. A pledge or obligation: meeting one's engagements.
4. A promise or agreement to be at a particular place at a particular time: a dinner engagement.
5.
a. Employment, especially for a specified time: his engagement with the firm.
b. A specific, often limited, period of employment: a speaking engagement.
6. A hostile encounter; a battle.
Synonyms: engagement, appointment, assignation, date1, rendezvous, tryst
These nouns denote a commitment to appear at a certain time and place: a business engagement; a dental appointment; a secret assignation; a date to play tennis; a rendezvous of agents at the border; a lovers' tryst.
These nouns denote a commitment to appear at a certain time and place: a business engagement; a dental appointment; a secret assignation; a date to play tennis; a rendezvous of agents at the border; a lovers' tryst.