transitive verb, intransitive verb overlapped -·lapped′, overlapping -·lap′·ping

1. to lap over; lie upon and extend beyond a part of (something or each other)
2. to extend over part of (a period of time, sphere of activity, etc.); coincide in part (with)

noun

1. an overlapping
2. a part that overlaps
3. the amount or extent of overlapping
4. the place of overlapping