Meaning of RANDOM in English

RANDOM

/ ˈrændəm; NAmE / adjective , noun

■ adjective

[ usually before noun ] done, chosen, etc. without sb deciding in advance what is going to happen, or without any regular pattern :

the random killing of innocent people

a random sample / selection (= in which each thing has an equal chance of being chosen)

The information is processed in a random order.

►  ran·dom·ly adverb :

The winning numbers are randomly selected by computer.

My phone seems to switch itself off randomly.

►  ran·dom·ness noun [ U ]:

It introduced an element of randomness into the situation.

■ noun

IDIOMS

- at random

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WORD ORIGIN

Middle English (in the sense impetuous headlong rush ): from Old French randon great speed, from randir gallop.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.