Overlap
Overlap , transitive verb
1.
To lay (one thing) over another; to lap.
2.
To cover part of.
Overlap , intransitive verb
1.
To be arranged so that a part of one object laying over part of another; as, the boards overlapped at their ends.
2.
To have the ending time of one period or process extend beyond the beginning time of another period or process; as, the lives of Theodore Roosevelt and Franklin Roosevelt overlapped by several decades.
Overlap , noun
1.
The lapping of one thing over another; as, an overlap of six inches; an overlap of a slate on a roof.
2.
(Geology) 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.