adjective
Definition: Having no value, effect, or significance; amounting to nothing or invalid.
Example: The contract was declared null after the court's decision.
noun
Definition: A term used to describe a value of zero or nothing, often in contexts like mathematics or computing.
Example: In programming, a variable that has not been assigned a value is often referred to as null.
transitive verb
Definition: To make something invalid or void; to cancel or negate it.
Example: The new law will null the previous regulations.