The CWU James E. Brooks Library has a lot of wonderful databases*, including the Oxford University Press's Oxford Reference Online - which does indeed contain a digital version of The Oxford Dictionary of English. There is no central authority for the English language, but everyone agrees that an OED usage is a correct usage.* You can reach these databases from off-campus using your last name (as it appears on your ID card) and your ID number (with a 0 in front of it).
The CWU Learning Commons Online Writing and Math Center now offers writing and math assistance to alACCOUNTING AND FINANCE TUTORING AT THE DES MOINES CENTER!
The CWU-Des Moines Writing and Math Center offers accounting and finance tutoring this winter on TueFind Us On Facebook