circularizePronunciation: /ˈsəːkjʊlərʌɪz/ (also circularise)Definition of circularize verb [with object] 1distribute a large number of letters or leaflets to (a group of people) in order to advertise something or canvas opinion: they circularize prospective purchasers at regular intervals 2 Biochemistry make (a stretch of DNA) into a circular loop. Derivatives circularizationPronunciation: /-ˈzeɪʃ(ə)n/ noun circularize in other Oxford dictionaries Definition of circularize in the US English dictionary