To turn or cause something to turn in a circle, especially around a fixed point. The Earth rotates on its axis once every 24 hours.
To regularly change the position or order of things or people, especially in a planned way. The company rotates its employees through different departments to give them a broad range of experience.
To take turns in a sequence or cycle. The team members rotate as the leader for each project.
In computing, to shift the bits of a binary value circularly to the left or right. The routine rotates the 8-bit register right by one position.