A pencil made of grease colored with a pigment, used especially for marking glossy surfaces.
 Example sentencesExamples
-  Or you might lightly mark the target's position on the screen with a grease pencil.
 -  They plot their movements with grease pencil over acetate on hard-copy maps.
 -  Vlad taught me how to edit tape without marking it with a grease pencil.
 -  Using grease pencils, these airmen etched the progress of enemy bombers onto the back of the Plexiglas board so that air defense commanders could evaluate and respond.
 -  Results are written on the bare sheet metal with a grease pencil.