COEXTEND Meaning of COEXTEND in English — coextension /koh'ik sten"sheuhn/ , n./koh'ik stend"/ , v.t. , v.i.to extend equally through the same space or duration. [ 1610-20; CO- + EXTEND ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012