英文字典中文字典51ZiDian.com

WordNet (r) 3.0 (2006) (WordNet)

superposition
n 1: (geology) the deposition of one geological stratum on
another
2: (geology) the principle that in a series of stratified
sedimentary rocks the lowest stratum is the oldest [synonym:
{principle of superposition}, {superposition principle},
{superposition}]
3: (geometry) the placement of one object ideally in the
position of another one in order to show that the two
coincide
4: the placement of one thing on top of another