One who executes or carries out (a purpose, design, command, work, etc.); one who carries into action, or puts into practice (some quality); a…
A person who fulfils something.
One who executes; = executor, n. 1.
One who executes or carries into effect (a command, design, instructions, law, justice, etc.); a perpetrator (of an evil deed). Rare in modern use.
gen. One who executes, performs, or carries out. Const. of.