The Collaborative International Dictionary
Promisor \Prom"is*or\, n. (Law)
One who engages or undertakes; a promiser.
--Burrill.
Douglas Harper's Etymology Dictionary
1790, agent noun in Latin form from promise (v.). Apparently restricted to legal use.
Wiktionary
n. (context legal English) One who engages or undertakes; a promiser.
WordNet
n. a person who makes a promise [syn: promiser]
Usage examples of "promisor".
Conclusion: Fiona White, the Sepbabe and promisor of night ecstasy, was home.
That action did not remain, as formerly, the remedy for all binding contracts to pay money, but, so far as parol contracts were concerned, could only be used where the consideration was a benefit actually received by the promisor.
The soldiers of the civic guard, offered a choice between pain and death or freedom and honorable employment—the promisors being men known to them, fellow mercenaries —had surrendered almost to a man and they now served with Hwil Kuk's squadron.