Definition of potestative in English:

potestative

Pronunciation /pəˈtɛstətɪv/

adjective

Law
  • Designating a condition within the control of one of the parties to a contract or agreement.

Origin

Mid 17th century (in an earlier sense). From post-classical Latin potestativus relating to power (late 2nd or early 3rd century in Tertullian), having power or authority (frequently from 1086 in British sources) from classical Latin potestāt-, potestās + -īvus.