Definitions
There is 1 meaning of the phrase
Null Set.
Null Set - as a noun
A set that is empty; a set with no members
Example Sentences
"The null set, denoted by ∅ or {}, is an empty set with no elements."
"In mathematics, the intersection of a set with the null set is always the null set."
"The null set is a subset of every set, including itself."
"A mathematical proof often involves showing that a set is a null set."
"The null set has cardinality zero since it contains no elements."