Null(a.) Of no legal or binding force or validity; of no efficacy; invalid; void; nugatory; useless.
Null(n.) Something that has no force or meaning.
Null(n.) That which has no value; a cipher; zero.
Null(n.) One of the beads in nulled work.
Null(v. t.) To annul.
Nulled(a.) Turned so as to resemble nulls.

Words within null