Ø (disambiguation)

For the Underoath album, see Ø (Disambiguation).

Ø may refer to:

• Ø, a Scandinavian letter and vowel
• [ø], the IPA symbol for a close-mid front rounded vowel
• Ø, a piece of land in Denmark
• ∅, a zero in linguistics
• Slashed zero, a representation of the number 0 (zero) to distinguish it from the letter O
• $\varnothing$, an empty set in mathematical set theory
• ⌀, the symbol for a diameter

Not to be confused with:

• Ф / ф, the Cyrillic letter corresponding to "f" or "ph"
• Φ / φ, the Greek letter phi, corresponding to "f" or "ph"
• Θ / θ, the Greek letter theta, corresponding to "th"