Notch
Definition 1 of 4
Pro Tip 1/2
Physical Mark
Notch as a small cut often serves as a physical mark or indicator. The carpenter added a notch to the wood to mark where to cut.
Pro Tip 2/2
Measurable Progress
Notches are used to track progress or count occurrences, like on a tally stick. The hiker marked a notch for every mile traveled.