assignation
noun
[ asɪɡˈneɪʃ(ə)n ]
• an appointment to meet someone in secret, typically one made by lovers.
• "his assignation with an older woman"
• the allocation or attribution of someone or something as belonging to something.
• "this document explains the principles governing the assignation of lexical units to lexemes"
Origin:
late Middle English (in the senses ‘command, appointment to office, or allotment of revenue’): via Old French from Latin assignatio(n- ), from the verb assignare (see assign).