boon (to/for somebody) something that is very helpful and makes life easier for you The new software will prove a boon to Internet users. Word Origin Middle English (originally in the sense ‘request for a favour’): from Old Norse bón.Extra examples The building scheme comes as an enormous boon for the building industry. These machines have proved a real boon to disabled people. The Christmas season is always a boon for minor actors. The new software will be an enormous boon to home computer users. Wildlife in your garden can be a real boon.