Overlap

Overlap may mean one of:

In set theory, an overlap of elements shared between sets is called an intersection, as in a Venn diagram.
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:

"Reaching over," term in Schenkerian theory, see Schenkerian analysis#Lines between voices, reaching over

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