Plotter Common

a planner who draws up a personal scheme of action

"The disgruntled employee was caught as a plotter when security found his detailed notes on how to sabotage the server room."

a clerk who marks data on a chart

"The senior engineer hired a skilled plotter to manually transfer the tide measurements onto the coastal survey charts before digital scanners were installed."

a member of a conspiracy

"The former employee was arrested as the chief plotter behind the scheme to steal company secrets."

an instrument (usually driven by a computer) for drawing graphs or pictures

"The engineer adjusted the settings on the plotter to ensure the new architectural blueprints were drawn with perfect precision."

A person who plots.

"The security team arrested a plotter who had been secretly organizing an attack on the airport for months."