notch

(noun) a V-shaped indentation. Example: "Mandibular notch."

(noun) the location in a range of mountains of a geological formation that is lower than the surrounding peaks. Synonyms: pass, mountain pass. Example: "We got through the pass before it started to snow."

(noun) a V-shaped or U-shaped indentation carved or scratched into a surface. Example: "There were four notches in the handle of his revolver."

(noun) a small cut. Synonyms: nick, snick.

(verb) cut or make a notch into. Example: "Notch the rope."

(verb) notch a surface to record something.