Zero can refer to several things.

Discussed in the article on the number

• 0, a number
• the zero function, a function which is the constant zero.
• the verb in computer science, which means to erase or set values to zero.

Discussed in other articles

• 0, a year used in numbering astronomical and Hindu years.
• Zero (linguistics) - an element not realized in speech.
• Zero (cartoonist) - Brazilian cartoonist.
• root (mathematics) - also known as the zero of a function.
• zero (complex analysis)
• A verb meaning to calibrate to a value of zero, as with a balance, weighing scale, or other measuring instrument. See calibration.
• Mitsubishi Zero - The Mitsubishi A6MA Japanese fighter aircraft used during the Second World War.
• In the title of several works named "Zero at the Bone", which comes from a line in a poem by Emily Dickinson titled "A Narrow Fellow in the Grass."
• an alternate name used by the 1980s Brisbane punk rock band Xero.
• A song by The Smashing Pumpkins
• The video game character called Zero (See Mega Man)
• The video game magazine called Zero
• The name of a candy bar.
• Zero day or 0day refers to software, media, or information that is obtained either prior to or on the day of the official release.
• 0 A.D. , a hobbyist real time strategy computer game project.
• Son Goku, a character from Dragon Ball (he is known as "Zero" in a late 1980's dub of Dragon Ball).
• Year Zero - the Cambodian genocide.
• Ground Zero - the location on the ground marking the detonation of a bomb; also used in relation to the World Trade Center