Pronunciation: (ran'dum),[key] —adj. 1. proceeding, made, or occurring without definite aim, reason, or pattern: the random selection of numbers. 2. Statistics.of or characterizing a process of selection in which each item of a set has an equal probability of being chosen.
3. Building Trades. a. (of building materials) lacking uniformity of dimensions: random shingles. b. (of ashlar) laid without continuous courses.
c. constructed or applied without regularity: random bond.
—n. 1. Chiefly Brit.bank3 (def. 7b).
2. at random, without definite aim, purpose, method, or adherence to a prior arrangement; in a haphazard way: Contestants were chosen at random from the studio audience.
—adv. Building Trades.without uniformity: random-sized slates.