superposition

IPA: supɝpʌzˈɪʃʌn

The placing of one thing on top of another.
(geology) The deposition of one stratum over another; the principle that in a series of sedimentary strata, the lower strata are the older.
(quantum mechanics) The situation in quantum mechanics where two or more quantum states are added together (superposed) to yield another valid quantum state.

Examples of "superposition" in Sentences

We are getting better at keeping things in superposition.
And one of the crazy consequences of quantum theory is that we can put an ion into something called a superposition state.
If a cat's life was directly tied to a quantum effect in superposition, would the cat be both alive and dead at the same time?
There is no mystery as to how the photon can be in superposition in both space and time if 4D spacetime is considered really real.
A simple superposition is not possible, because the knowledge of the weight in the equation of every single factor is unknown to man.
A simple way to understand this is that the simple meaning of the word superposition is the placement of one thing on top of another.
The single electron at the top (in superposition of both spin up and spin down states) is measured, and reduces to a single classical state (e.g. spin down).
Penrose had an answer to why large things don't appear in superposition (the more the mass, the faster to Objective Reduction (OR) due to gravitational energy), but he didn't have a ready answer for why observations caused OR.