D defs.my
Entry 3 senses Webster, 1913

Agitator

/ăj'-ət-ātˌ-ẽr/ · Ag·i·ta·tor · IPA /ˈædʒɪteɪtɚ/
01 n. One who agitates; one who stirs up or excites others; as, political reformers and agitators.
  1. 1.
    One who agitates; one who stirs up or excites others; as, political reformers and agitators.
  2. 2.
    One of a body of men appointed by the army, in Cromwell's time, to look after their interests; -- called also adjutators.(Eng. Hist.) Also: adjutators
  3. 3.
    An implement for shaking or mixing.