null

Science, technology, and mathematics

Astronomy

Nuller, an optical tool using interferometry to block certain sources of light

Computing

Null (SQL) (or NULL), a special marker and keyword in SQL indicating that a data value does not exist, is not known, or is missing

Null character, the zero-valued ASCII character, also designated by NUL, often used as a terminator, separator or filler. This symbol has no visual representation

Null device, a virtual file that discards data written to it, on Unix systems /dev/null

Null pointer or reference (sometimes written NULL, nil, or None), an object pointer (or reference) not currently set to point (or refer) to a valid object

Linguistics

Null (linguistics) (sometimes zero), a segment that is not pronounced or written:

Null morpheme (or zero morpheme), a morpheme that has no phonetic form

Null coda, the coda of syllables ending in a vowel; especially in reference to languages that forbid codas

Null onset (or empty onset, or zero onset), the onset of syllables beginning in a vowel; forbidden in some languages

Null-onset letter (or zero consonant), a consonant letter that does not correspond to a consonant sound, but is required when a word or syllable starts with a vowel

Null-subject language, a language whose grammar permits an independent clause to lack an explicit subject; such a clause is said to have a "null subject"

Null copula (or zero copula), a phenomenon whereby the subject is joined to the predicate without overt marking of this relationship

Mathematics

Null (mathematics), a zero value in several branches of mathematics

Physics

Null (physics), a point in a field where the field quantity is zero

Null (radio), a concept in electromagnetism

Arts and media

The Null Corporation, an imprint of the band Nine Inch Nails

Null (Intronaut EP), 2006

Null (Foetus EP), 1995

Null, an identity of the character Gray Fox in the Metal Gear Solid: Portable Ops video game

Null, a villain from Teenage Mutant Ninja Turtles Adventures

Null (The Legend of Zelda), the main antagonist of The Legend of Zelda: Echoes of Wisdom

Null, a character from Baldi's Basics

People with the surname

Ashley Null (born 1960s), American Anglican theologian and bishop

Christopher Null (born 1971), American writer and film critic

Cecil Null (1927–2001), American songwriter

Eduard van der Nüll (1812–1868), Austrian architect

Gary Null (born 1945), American radio host and author of works about alternative medicine

Jack Null (1924–2003), American college basketball coach

Keith Null (born 1985), American football player

Luke Null (born 1990), American actor and comedian