1.Definition: (geology) the deposition of one geological stratum on another

Category: General

2.Definition: (geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest

Category: General

3.Definition: (geometry) the placement of one object ideally in the position of another one in order to show that the two coincide

Category: General

4.Definition: the placement of one thing on top of another

Category: General