If the direction of motion and the speed of a body do not change with time, what kind of motion does it have?

If the direction of motion and the speed of a body do not change with time, then there will be uniform motion.
If a body travels in a straight line and covers equal distances in equal time intervals, its motion is called uniform motion. In other words, the direction of motion and the speed of a body do not change with time. On the other hand, if the speed or direction of the body does not remain constant, it is defined as non-uniform motion.