Intended for use by an invalid.
Not valid; not true, correct, acceptable or appropriate.
Suffering from disability or illness.
To make invalid or affect with disease.
To exempt from (often military) duty because of injury or ill health.
Having no validity; "null and void".
Insignificant.
Causing a complete loss of gene function; amorphic.
Absent or non-existent.
Of the null set.
Of or comprising a value of precisely zero.
Neutral.
To crack; to remove restrictions or limitations in (software).
To return to the null position, setting, etc.
To form nulls, or into nulls, as in a lathe.
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.
Zero quantity of expressions; nothing.
One of the beads in nulled work.
A non-existent or empty value or set of values.
Something that has no force or meaning.
The attribute of an entity that has no valid value.
The null hypothesis.