# Ø (disambiguation)

For the Underoath album, see Ø (Disambiguation).

The letter Ø and the similar-looking symbol may refer to:

## Other

• Ø is the solo identity of Finnish musician Mika Vainio of electronic music band Pan Sonic
• Ø, Denmark, piece of land in Denmark meaning island
• Slashed zero, a representation of the number 0 (zero) to distinguish it from the letter O
• Empty set ($\varnothing$ ) in mathematical set theory
• Diameter, by the symbol
• Half-diminished seventh chord, in music by the symbol ø
• Plimsoll line (o), the line where the hull of a ship meets the surface of the water
• Standard state (o), in chemistry