Definition:
Jumping is the action of propelling oneself upward in to the air. It involves a single act of thrusting oneself off the ground and into the air, using the legs and arms to propel oneself into the air for a brief moment before returning to the ground again.
Rules:
using jumping to refer to a single act of propelling oneself upward, as well as using it as a gerund to refer to the activity of jumping, such as 'jumping is fun'.
Examples:
'Jumping off a cliff can be dangerous'
'Jumping is a great way to stay in shape'.
Tips, nuances, and common mistakes include:
jumping can be used as a gerund to refer to the activity of jumping as a sport, but not as a noun when talking about the object itself.