Pencil/ˈpensl/ Definition 1 of 4Pro Tip 1/3Writing Instrument A pencil is specifically for writing or artistic drawing, not suitable for other uses. I used a pencil to complete the crossword puzzle. Pro Tip 2/3Not Permanent Pencil marks can be erased, making them less permanent than pens. I draft essays in pencil so I can make changes easily. Pro Tip 3/3Variety of Hardness Pencils come in different hardness levels, affecting the darkness of the lines. For darker lines, choose a softer pencil like 2B.