This is a subject that has caused quite a bit of confusion to more than one apprentice, over the years.
It really depends on what sort of motor one is referring to.
Any Split-Phase motor can be reversed by reversing the polarity of either the Start or
the Run winding, but not both
Shaded-pole motors cannot be reversed and these come in CW (clockwise) and CCW (counter-clockwise) versions.
You can reverse any Cage motor by reversing the polarity of the Phase-Neutral connections at the motor.
Let's face it, these days if you're not young, you're old - Red Green