D defs.my
Entry 2 senses Webster, 1913

Doer

/do͞or/ · Do·er · IPA /ˈduː.ɚ/
01 n. One who does; one who performs or executes; one who is wont and ready to act; an actor; an agent.
  1. 1.
    One who does; one who performs or executes; one who is wont and ready to act; an actor; an agent.
    “The doers of the law shall be justified.” — Rom. ii. 13.
  2. 2.
    An agent or attorney; a factor.(Scots Law)