A non-existent or empty value or set of values.

Zero quantity of expressions; nothing.

Something that has no force or meaning.

(computing) The null character; the ASCII or Unicode character (␀), represented by a zero value, which indicates no character and is sometimes used as a string terminator.

(computing) The attribute of an entity that has no valid value.

One of the beads in nulled work.

(statistics) The null hypothesis.

(transitive, archaic) To nullify; to annul.

To return to the null position, setting, etc.

To form nulls, or into nulls, as in a lathe.

(computing, slang, transitive) To crack; to remove restrictions or limitations in (software).

Having no validity; "null and void".

Insignificant.

Absent or non-existent.

(mathematics) Of the null set.

(mathematics) Of or comprising a value of precisely zero.

(genetics, of a mutation) Causing a complete loss of gene function; amorphic.

(mechanical engineering, of a position or setting) Neutral.