Meaning : (geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest.
Synonyms : superposition, superposition principle
Meaning : The displacement of any point due to the superposition of wave systems is equal to the sum of the displacements of the individual waves at that point.
Example :
The principle of superposition is the basis of the wave theory of light.
Synonyms : huygens' principle of superposition