To interrupt or stop the flow or supply of something. The manager decided to cut off the electricity to the unused section of the building.
To interrupt someone while they are speaking. She was about to explain her point when he rudely cut her off.
To remove or detach by cutting. He cut off a piece of the rope to use for the project.
To stop providing financial or other support. After years of financial assistance, his parents decided to cut him off.
To block or obstruct a path or route. The fallen tree cut off the main road, forcing drivers to find an alternative route.