overlap

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To lie or extend over and cover part of.
2. v. To have an area or range in common with.
3. v. To lie over and partly cover something.
4. v. To correspond in character or function: Their duties overlap.
5. v. Mathematics To have one or more elements in common. Used of sets.
6. n. A part or portion that overlaps or is overlapped.
7. n. An instance of overlapping.

Century Dictionary and Cyclopedia

1. To lap or fold over; extend so as to lie or rest upon: as, one slate on a roof overlaps another.
2. To cause to lap or fold over: as, to overlap slates or shingles on a roof.
3. n. The lapping of one thing over another; also, the thing or part which overlaps; specifically, in geology, a disposition of the strata such that newer or more recent members of a formation lap over or are deposited beyond the limits of the older beds. This is caused by the subsidence of the regions in which deposition is taking place, so that each successive layer extends further inland than the preceding one.

Wiktionary

1. v. To extend over and partly cover something.
2. v. To have an area, range, character or function in common.
3. v. mathematics Used of sets that have some elements in common.
4. n. Something that overlaps or is overlapped
5. n. rugby a situation in the game where an attacking line has more players in it than the defensive line coming to meet it. The attacking side may exploit the overlap by using their superior numbers to break the opposition's defensive line. If attackers outnumber defenders by more than one player this is often termed a two man overlap or three man overlap, etc. If the attacking side fails to break through usually due to poor execution, they are said to waste an overlap.

GNU Webster's 1913

1. v. To lay (one thing) over another; to lap.
2. v. To cover part of.
3. v. To be arranged so that a part of one object laying over part of another.
4. v. To have the ending time of one period or process extend beyond the beginning time of another period or process.
5. n. The lapping of one thing over another
6. n. (Geol.) An extension of geological beds above and beyond others, as in a conformable series of beds, when the upper beds extend over a wider space than the lower, either in one or in all directions.

WordNet 3.0

1. v. extend over and cover a part of
2. n. the property of partial coincidence in time
3. v. coincide partially or wholly
4. n. a flap that lies over another part
5. n. a representation of common ground between theories or phenomena