randomness

n. fortuitousness, state of being accidental, haphazardness

The word random is used to express lack of order, purpose, cause, or predictability in non-scientific parlance. A random process is a repeating process whose outcomes follow no describable deterministic pattern, but follow a probability distribution.The term randomness is often used in statistics to signify well defined statistical properties, such as lack of bias or correlation. Monte Carlo Methods, which rely on random input, are important techniques of computational science. Random selection is an official method to resolve tied elections in some jurisdictions, and is even an ancient method of divination, as in tarot, the I Ching, and bibliomancy. In the Book of Numbers, God orders Moses to divide the land of Israel by random selection.
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Noun
1. (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work; "entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity"
(synonym) entropy, S
(hypernym) physical property
(hyponym) conformational entropy
(classification) thermodynamics
2. the quality of lacking any predictable order or plan
(synonym) haphazardness, stochasticity, noise
(hypernym) irregularity, unregularity
(hyponym) ergodicity

1. An inexplicable misfeature; gratuitous inelegance.
2. A hack or crock that depends on a complex combination of coincidences (or, possibly, the combination upon which the crock depends for its accidental failure to malfunction). "This hack can output characters 40--57 by putting the character in the four bit accumulator field of an XCT and then extracting six bits - the low 2 bits of the XCT opcode are the right thing." "What randomness!"
3. Of people, synonymous with "flakiness". The connotation is that the person so described is behaving weirdly, incompetently, or inappropriately for reasons which are (a) too tiresome to bother inquiring into, (b) are probably as inscrutable as quantum phenomena anyway, and (c) are likely to pass with time. "Maybe he has a real complaint, or maybe it's just randomness. See if he calls back."
[Jargon File]

Synonyms and related words:
aimlessness, capriciousness, causelessness, chance, chanciness, changeableness, derangement, designlessness, disarrangement, disarray, disarticulation, discomfiture, discomposure, disconcertedness, disharmony, dishevelment, disintegration, disjunction, disorder, disorderliness, disorganization, disproportion, disruption, disturbance, dysteleology, entropy, erraticism, erraticness, fickleness, haphazardness, hesitancy, hesitation, incalculability, incertitude, incoherence, indecision, indecisiveness, indemonstrability, indeterminacy, indetermination, indeterminism, indiscriminateness, inharmonious harmony, irregularity, irresolution, luck, most admired disorder, nonsymmetry, nonuniformity, perturbation, promiscuity, promiscuousness, purposelessness, suspense, suspensefulness, turbulence, unaccountability, uncertainness, uncertainty, uncertainty principle, undecidedness, undeterminedness, unforeseeableness, unpredictability, unprovability, unsureness, unsymmetry, ununiformity, unverifiability, upset, vacillation, whimsicality