Definition of promissor in US English:

promissor

noun

  • Roman Law. A person who makes a promise.

Origin

Late 16th century (in an earlier sense). From classical Latin prōmissor person who promises or guarantees (usually in legal context) from prōmiss-, past participial stem of prōmittere + -or.

Pronunciation

promissor

/prəˈmɪsə/