Is the following sentence true or false? Acceleration refers to increasing speed decreasing speed or changing direction

This is from the dictionary:

the act of accelerating; increase of speed or velocity.

The sentence is true. Acceleration is a fundamental concept in physics that refers to any change in an object's velocity. This change can be an increase in speed, a decrease in speed, or a change in direction. To verify this information, you can refer to any reliable physics textbook or search online for definitions of acceleration.