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Wordnet 3.0

NOUN (4)

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;
[syn: 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;


The Collaborative International Dictionary of English v.0.48:

Superposition \Su`per*po*si"tion\, n. [Cf. F. superposition. See Super-, and Position.] The act of superposing, or the state of being superposed; as, the superposition of rocks; the superposition of one plane figure on another, in geometry. [1913 Webster]
WordNet (r) 3.0 (2006):

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 [syn: 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