This is a public domain dictionary based on the 1913 Webster's Revised Unabridged Dictionary. It is not Oxford, but it is extensive and free.
If you read nothing else, follow these 30 seconds of steps to get the Oxford Dictionary on your Mac for free: oxford dictionary for mac download free
Congratulations. You have just legally accessed the Oxford Dictionary on your Mac for exactly $0.00. This is a public domain dictionary based on
If you truly want the Oxford English Dictionary (the historical, multi-volume edition) or the Compact Oxford English Dictionary, you can install custom dictionaries into the native Mac Dictionary app using a tool called DictUnifier. Drag your preferred dictionary to the top of
Note: This method requires you to legally own the dictionary data. You cannot download copyrighted .dict files from random websites.