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early 15c., "temporary halting or deprivation," from Latin suspensionem (nominative suspensio) "the act or state of hanging up, a vaulting," from past participle stem of suspendere "to hang" (see suspend).
A semblance of truth sufficient to procure for these shadows of imagination that willing suspension of disbelief for the moment, which constitutes poetic faith. [Coleridge, "Biographia Literaria," 1817]Meaning "action of hanging by a support from above" is attested from 1540s. Suspension bridge first recorded 1821.
suspension sus·pen·sion (sə-spěn'shən)
A noncolloidal dispersion of solid particles in a liquid, often used for pharmaceutical preparations.
The fixation of an organ to other tissue for support, as the uterus.
The hanging of a part from a support, such as a plaster-encased limb.
A mixture in which small particles of a substance are dispersed throughout a gas or liquid. If a suspension is left undisturbed, the particles are likely to settle to the bottom. The particles in a suspension are larger than those in either a colloid or a solution. Muddy water is an example of a suspension. Compare colloid, solution.
In lazy evaluation, a suspension (or in Henderson's terminology, a "recipe") is a closure with a flag indicating whether the expression has been evaluated or not. When the expression is evaluated the first time, this flag is set. Subsequent requests for the value of the expression will not attempt to re-evaluate it.