overlap

v. i. 1. To be arranged so that a part of one object laying over part of another; as, the boards overlapped at their ends. [ PJC ]

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. [ PJC ]

n. 1. The lapping of one thing over another; as, an overlap of six inches; an overlap of a slate on a roof. [ 1913 Webster ]

2. (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. [ 1913 Webster ]

adj. 1. same as clinker-built; -- of ships.
Syn. -- lap-jointed, lap-strake, lap-straked, lap-streak, lap-streaked. [ WordNet 1.5 ]