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Phonetics
verb
To extend over and partly cover something.
Example: The mouse-mat overlapped the edge of the desk.To have an area, range, character or function in common.
Example: The two maps overlapped at the east and west edges.Of sets: to have some elements in common.
Example: The set (all men) overlaps the set (vegetarians).To have some similar nucleotide sequences.
noun
The situation in which things overlap.
adjective
That overlaps something else