eclipser|ɪˈklɪpsə(r)| [f. eclipse v. + -er.] One who eclipses, darkens, obscures, or outshines. 1594Barnfield Affect.Sheph. ii. xxix, Oh foule Eclipser of that fayre sun-shine.1748Richardson Clarissa (1811) IV. xvi. 79 They confessed themselves eclipsed, without envying the eclipser.