1》 made, done, or happening without method or conscious decision.
↘ Brit. informal rather strange; odd.
2》 Statistics governed by or involving equal chances for each item.
3》 (of masonry) with stones of irregular size and shape.
~ization or ~isation noun
~ize or ~ise verb
ME (in the sense 'impetuous headlong rush'): from OFr. randon 'great speed', from randir 'gallop', from a Gmc root shared by rand 2 .