Definify.com
Webster 1913 Edition
Overlap
Oˊver-lap′
,Verb.
T.
1.
To lay (one thing) over another; to lap.
O′ver-lapˊ
,Noun.
1.
The lapping of one thing over another;
as, an
overlap
of six inches; an overlap
of a slate on a roof.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.