Meaning

• A V-shaped cut.

• An indentation.

• A mountain pass; a defile.

• A discontinuous change in a taxation schedule.

• A level or degree.

  "Can you speak a notch louder, please?"

• A portion of a mobile phone that overlaps the edge of the screen, used to house camera, sensors etc. while maximizing screen space.

Meaning

• To cut a notch in (something).

• To record (a score or similar) by making notches on something.

  "The tribe's hunters notch their kills by notches on each's axe's handle."

• To join by means of notches.

• To achieve (something); to add to one's score or record of successes.

  "The team notched a pair of shutout wins on Sunday."

• To fit (an arrow) to a bow by means of the notch cut at the end of the arrow; to nock.