Definitions from Wiktionary ( )

▸ noun:  The process or result of being gradually decomposed; rot, decomposition.
▸ noun:  A deterioration of condition; loss of status, quality, strength, or fortune.
▸ noun:  (obsolete) Overthrow, downfall, destruction, ruin.
▸ noun:  (programming) The situation, in programming languages such as C, where an array loses its type and dimensions and is reduced to a pointer, for example by passing it to a function.
▸ verb:  (intransitive) To deteriorate, to get worse, to lose strength or health, to decline in quality.
▸ verb:  (intransitive, electronics, of storage media or the data on them) To undergo bit rot, that is, gradual degradation.
▸ verb:  (intransitive, computing, of software) To undergo software rot, that is, to fail to be updated in a changing environment, so as to eventually become legacy or obsolete.
▸ verb:  (intransitive, physics, of a satellite's orbit) To undergo prolonged reduction in altitude (above the orbited body).
▸ verb:  (intransitive, of organic material) To rot, to go bad.
▸ verb:  (intransitive, transitive, physics, chemistry, of an unstable atom) To change by undergoing fission, by emitting radiation, or by capturing or losing one or more electrons; to undergo radioactive decay.
▸ verb:  (intransitive, transitive, physics, of a quantum system) To undergo optical decay, that is, to relax to a less excited state, usually by emitting a photon or phonon.
▸ verb:  (intransitive, aviation) Loss of airspeed due to drag.
▸ verb:  (transitive) To cause to rot or deteriorate.
▸ verb:  (programming, intransitive) Of an array: to lose its type and dimensions and be reduced to a pointer, for example when passed to a function.

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