One of the units in a course, as on an ascending or descending scale
To gain (a point or points) in a game or contest
"I'm just turning the heat up a notch," he added.
It's a top notch hospital.
The thread was secured by a spiral notch in the stick.
He'd recently employed a deputy who was doing a top notch job.
My security system is top notch though I've had little need to utilize it.