UPRUSH Meaning of UPRUSH in English /up"rush'/ , n.1. an upward rush, as of water or air. 2. an abrupt increase: an uprush of business during the noon hour.[ 1870-75; UP- + RUSH 1 ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012