assignation

[as-ig-ney-shuh n] /ˌæs ɪgˈneɪ ʃən/
noun
1.
an appointment for a meeting, especially a lover's secret rendezvous.
2.
the act of assigning; assignment.
Origin
1400-50; late Middle English assignacioun < Latin assignātiōn- (stem of assignātiō). See assign, -ation
Related forms
reassignation, noun
Can be confused
assignment, assignation.
British Dictionary definitions for assignation

assignation

/ˌæsɪɡˈneɪʃən/
noun
1.
a secret or forbidden arrangement to meet, esp one between lovers
2.
the act of assigning; assignment
3.
(law, mainly Scot) another word for assignment
Word Origin
C14: from Old French, from Latin assignātiō a marking out; see assign
Word Origin and History for assignation
n.

early 14c., "appointment by authority," from Old French assignacion (14c., Modern French assignation), from Latin assignationem (nominative assignatio) "an assigning, allotment," noun of action from past participle stem of assignare (see assign). Meaning "action of legally transfering" (a right or property) is from 1570s; that of "a meeting by arrangement, tryst" is from 1650s.