Look up fourth in Wiktionary, the free dictionary.

Fourth can refer to:

• ¼, one quarter
• Fourth, the ordinal number following third

[edit] Music

• Perfect fourth in music theory
• Augmented fourth or tritone
• Subdominant, and the chord built on the subdominant
• Fourth (album), an album by Soft Machine
• Forth (album), an album by The Verve

[edit] See also

• 4 (disambiguation)
• Forth

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