What is clockwise and what is counterclockwise?

Clockwise means running in the direction of clockwise movement. Counterclockwise means moving in the opposite direction from clockwise.

The reason why the hour hand turns clockwise is because the sun rises and sets in the west, and the shadow projected on the sundial runs in the opposite direction, so does the arrangement of numbers representing time on the sundial.

Just as motion and stillness are relative, whether an object rotates clockwise or counterclockwise is also related to the observation angle. For example, when viewed from directly above the North Pole, the rotation of the earth is counterclockwise, and when viewed from directly above the South Pole, the rotation of the earth is clockwise.

Mathematically, the clockwise rotation angle is negative and the counterclockwise rotation angle is positive.

In sports, such as table tennis, the server sends a ball that seems to rotate clockwise. On the opposite table, the ball seen by the other side also rotates clockwise, because both of them are standing directly above the ball to observe the rotation of the ball.

Mathematically, the circle defined by equations x = sint and y = cost in rectangular coordinate system is drawn clockwise with the increase of subordinate t value. In other words, when you keep moving to the right, you are also moving clockwise.