Harrovian adjective 1noun 1forms 3 adjective1 •Of or relating to Harrow School, England. noun1 •A pupil of Harrow School, England.For instance, from 1857 forty or fifty Harrovians met and played every Wednesday and matches were often arranged between particular colleges, the teams being made up entirely of Harrovians. — 2005 formsHarrovians · more Harrovian · most Harrovian