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1. Having no specific pattern, purpose, or objective: random movements. See Synonyms at chance.
2. Mathematics & Statistics Of or relating to a type of circumstance or event that is described by a probability distribution.
3. Of or relating to an event in which all outcomes are equally likely, as in the testing of a blood sample for the presence of a substance.
at random
Without a governing design, method, or purpose; unsystematically: chose a card at random from the deck.

[From at random, by chance, at great speed, from Middle English randon, random, speed, violence, surge, from Old French randon, from randir, to run, probably from Frankish *rand, border, margin (as of a field, used as a racecourse); akin to German Rand, edge.]

ran′dom·ly adv.
ran′dom·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.randomness - (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"
physical property - any property used to characterize matter and energy and their interactions
conformational entropy - entropy calculated from the probability that a state could be reached by chance alone
thermodynamics - the branch of physics concerned with the conversion of different forms of energy
2.randomness - the quality of lacking any predictable order or plan
unregularity, irregularity - not characterized by a fixed principle or rate; at irregular intervals
ergodicity - an attribute of stochastic systems; generally, a system that tends in probability to a limiting form that is independent of the initial conditions


[ˈrændəmnɪs] Naleatoriedad f


[ˈrændəmnɪs] ncaractère m aléatoire
the apparent randomness of sth → le caractère apparemment aléatoire de qchrandom number nnombre m aléatoire
References in periodicals archive ?
A key challenge of the project was building an understanding of the concept of randomness within the activities in such a way that students could draw meaningful conclusions about populations from small samples.
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In my new book, I talk a lot about how ant societies exploit randomness and Y[pounds sterling]leaderlessness' to learn and flourish.
As one who has spent a lot of time pondering microscopic images of distributions of one phase in another, I can't help but wonder if we're just seeing randomness in this picture.
However, each play is unique because of the randomness of the pictures chosen in the level, the randomness of the picture order, and the random placement of the answers.
Guys like the Norwegian lunatic, or the idiot who fancied himself a villain and opened fire in a Batman movie, are not so good, but still qualify as elements of randomness.
But randomness is often seen as incompatible with the historic Christian understanding of God's nature both by naturalists and theists.
Nuno da Luz is fascinated by the randomness of the events that take place all around us, whether natural catastrophes or simple everyday accidents--and particularly by the ways we accept or refuse them.
FOR all the words that have been written about Derrick Bird's insane rampage, it is the cruel randomness of it all that our minds struggle to deal with.
The randomness of the attack and the age of the children shocked China.
Randomness and uncertainty are not occasional deviations from the 'true' principles upon which life is built.
Another common uncertainty for new players is game randomness at the online casino.