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Overlap may mean one of:

  • In music theory, overlap is a synonym for reinterpretation of a chord at the boundary of two musical phrases
  • Overlap (railway signalling), the length of track beyond a stop signal that is proved to be clear of obstructions as a safety margin
  • Overlap (road), a place where multiple road numbers overlap
  • Overlap add, an efficient convolution method using FFT
  • Overlap coefficient, a similarity measure between sets
  • Orbital overlap, important concept in quantum mechanics describing a type of orbital interaction that affects bond strength

Overlapping can refer to: