How do you spell Cannon

Available Definitions:
1)  pl. - of Cannon
2)  n. - A great gun; a piece of ordnance or artillery; a firearm for discharging heavy shot with great force.
3)  n. - A hollow cylindrical piece carried by a revolving shaft, on which it may, however, revolve independently.
4)  n. - A kind of type. See Canon .
5)  n. & v. - See Carom .