Also 6 -our. [f. as prec. + -ER1.] One who or that which surmounts; † one who or that which excels (obs.); an overcomer, vanquisher.

1

c. 1500.  Three Kings’ Sons, 177. A man that hight Le Surnome, which was the floure and surmountour of alle othir.

2

1589.  Puttenham, Engl. Poesie, III. xxv. (Arb.), 309. Arte is not only an aide … to nature in all her actions, but … in some sort a surmounter of her skill.

3

a. 1610.  Healey, Epictetus (1636), 2. Surmounters of all lets and impediments.

4