plotter

noun
UK /ˈplɒtə/
US /ˈplɑːtər/

A plotter is a person who secretly makes a plan to do something bad.

The police caught the plotter before he could carry out his plan.


OTHER MEANINGS

2. A machine that draws graphs or maps by moving a pen over paper.

The engineer used a plotter to print the large map.

3. A person who marks points on a chart or map.

The navigator acted as the plotter, marking their position on the sea chart.

4. A small device that holds and moves a pen or cutting tool.

The sign maker loaded a new blade into the plotter to cut the vinyl.