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Related to at random: random number generator
With no discernable pattern or reasoning. We will choose a raffle winner at random.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
by chance; haphazard. The lottery numbers are chosen at random. As a prank, the children dialed phone numbers at random.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Without order or fixed purpose, haphazardly, as in Jackson Pollock dropped paints on canvas seemingly at random. Originally this phrase meant "very speedily" and "heedlessly." Shakespeare had the present usage in 1 Henry VI (5:3): "He talks at random; sure the man is mad." [Late 1500s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Without a governing design, method, or purpose; unsystematically: chose a card at random from the deck.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.