Campaigner

//kæmˈpeɪnə(ɹ)// noun

Definitions

Noun
  1. 1
    A person who has served in a military campaign.
  2. 2
    a politician who is running for public office wordnet
  3. 3
    A military veteran. broadly
  4. 4
    A person who campaigns for a person running for political office or works, or supports, in an organised and active way towards a goal; an activist.

    "The US supreme court has ruled unanimously that natural human genes cannot be patented, a decision that scientists and civil rights campaigners said removed a major barrier to patient care and medical innovation."

  5. 5
    Someone with experience in a certain field.

Etymology

From campaign (verb) + -er (agent noun suffix) or from campaign (noun) + -er (occupational suffix).

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