Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Mathsquadri-quadri- /kwɒdrə $ kwɑː-/ (also quadru-, quadr-) prefix HMINCREASE IN NUMBER OR AMOUNTfour or four times a quadrilateral (=shape with four straight sides) a quadruped (=animal with four legs) ldoceonline.com