Pronunciation: (ran'dum), [key]
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.
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.
Building Trades.without uniformity: random-sized slates.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.