| 1. | an angular or V-shaped cut, indentation, or slit in an object, surface, or edge. |
| 2. | a cut or nick made in a stick or other object for record, as in keeping a tally. |
| 3. | New England and Upstate New York. a deep, narrow opening or pass between mountains; gap; defile. |
| 4. | Informal. a step, degree, or grade: This camera is a notch better than the other. |
| 5. | Metallurgy. a taphole in a blast furnace: iron notch; cinder notch. |
| 6. | to cut or make a notch in. |
| 7. | to record by notches: He notched each kill on the stick. |
| 8. | to score, as in a game: He notched another win. |
| 9. | notch up or down, to move up or down or increase or decrease by notches or degrees: The temperature has notched up another degree. |

notch
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notch (nŏch)
n.
An indentation at the edge of a structure; an incisure.
An upstroke or peak on a pulse tracing.