'Parallel' may refer to:
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Parallel (geometry)
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Parallel (latitude), an imaginary east-west line circling a globe
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Parallelism (grammar), a balance of two or more similar words, phrases, or clauses
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''Parallel'' (manga), a shōnen manga by Toshihiko Kobayashi
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''Parallel'' (video), a video album by R.E.M.
★ "
The Parallel", an episode of
The Twilight Zone
★ ''
Parallel 9'', a British children's television show
In 'music':
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Parallel key, the minor (or major) key of a major (or minor) key with the same tonic
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Harmonic parallelism, also known as "harmonic planing" or "parallel voice leading"
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Parallel fifths, the concurrence of successive intervals of a perfect fifth between two voices
In 'other uses':
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Parallel algorithm
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Parallel circuits, as opposed to series
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Parallel computing
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Parallel evolution
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Parallel import, also known as a "grey market product"
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Parallel universe
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Parallel port
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Parallel communications
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Parallel parking
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Parallel study, a type of clinical study
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Parallel transport, in mathematics using vectors and smooth curves