1. the act of superposing or the state of being superposed: "yet another technique in the forensic specialist's repertoire is photo superposition” ( patrick Nuyghe).
2. geology the principle that in a group of stratified sedimentary rocks the lowest were the earliest to be deposited.

1. the placing of one thing on top of another
2. the deposition of one stratum over another; the principle that in a series of sedimentary strata, the lower strata are the older

1. the act of superposing, or the state of being superposed.

1. the act of superposing; a placing above or upon; a lying or being situated above or upon something else.
2. in botany, same as anteposition, 2.
3. specifically, in geology, noting the relations of stratified formations to one another from the point of view of the relative time of their deposition.
4. in geometry, the ideal operation of carrying one magnitude to the space occupied by another, and showing that they can be made to coincide throughout their whole extent.
5. in the early church, an addition to or extension of a fast; a fast longer than the ordinary fast.

1. the placement of one thing on top of another
2. (geology) the deposition of one geological stratum on another
3. (geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest
4. (geometry) the placement of one object ideally in the position of another one in order to show that the two coincide