from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The act of superposing or the state of being superposed: "Yet another technique in the forensic specialist's repertoire is photo superposition” ( Patrick Nuyghe).
  • n. Geology The principle that in a group of stratified sedimentary rocks the lowest were the earliest to be deposited.

from Wiktionary, Creative Commons Attribution/Share-Alike License

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

from the GNU version of the Collaborative International Dictionary of English

  • n. The act of superposing, or the state of being superposed.

from The Century Dictionary and Cyclopedia

  • n. The act of superposing; a placing above or upon; a lying or being situated above or upon something else.
  • n. In botany, same as anteposition, 2.
  • n. Specifically, in geology, noting the relations of stratified formations to one another from the point of view of the relative time of their deposition.
  • n. 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.
  • n. In the early church, an addition to or extension of a fast; a fast longer than the ordinary fast.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

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


Sorry, no etymologies found.



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  • It warms my heart not only to be reminded by the CD&C of the mathematical term superpose, but to learn as well that there’s a French word spelled superposer.

    October 9, 2011

  • "In Schrodinger's famous thought experiment of the 1930s, a cat would be placed in a sealed box with a device containing atomic material.

    A Geiger counter was included to measure radiation if at some point an atom decayed. Should that happen, the Geiger counter would trigger the release of cyanide gas, which would kill the cat.

    The idea was that it was impossible to know whether or not the cat was alive or dead without opening the box and observing it, and that until that happened, both realities existed. This became known as superposition."

    - Carl Holm, Scientists teleport Schrodinger's cat,, 15 April 2011.

    April 28, 2011