- Having no specific pattern, purpose, or objective: random movements. See Synonyms at chance.
- Mathematics & Statistics Of or relating to a type of circumstance or event that is described by a probability distribution.
- 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.