Ø (disambiguation)

Ø (and ø) is a Scandinavian vowel letter.

Ø, ∅ etc may also refer to:

Language

Close-mid front rounded vowel (IPA: ø)
Unvoiced bilabial fricative (IPA: ɸ)
Unvoiced dental fricative (IPA: θ)
Zero (linguistics) (∅)
Ef (Cyrillic) (Ф and ф), a Cyrillic letter, corresponding to "f" or "ph"
Phi (Φ and φ), a Greek letter, corresponding to "f" or "ph"
Theta (Θ and θ), a Greek letter, corresponding to "th"
Fita (Ѳ and ѳ), an Old Cyrillic letter, corresponding to "f" and transliterating Greek theta
Oe (Cyrillic) (Ө and ө), Cyrillic barred O, representing an open-mid front rounded vowel in some Turkic and Mongolic languages

Slashed zero (0̸), a representation of the number 0 (zero) to distinguish it from the letter O
Diameter (⌀)
Plimsoll line (o), the line where the hull of a ship meets the surface of the water
Standard state (o), in chemistry
Empty set ( $\varnothing$ ), in mathematical set theory

Ø, Denmark, a piece of land in Jutland, Denmark
Half-diminished seventh chord (^ø), in music
Ø, the solo identity of Finnish musician Mika Vainio of electronic music band Pan Sonic