1. Being or producing something like nothing done or experienced or created before
   "stylistically groundbreaking works";
   - innovative, innovational, innovatory, path-breaking

1. The ceremonial breaking of the ground to formally begin a construction project
   "The mayor attended the groundbreaking ceremony for the new community centre";
   - groundbreaking ceremony

Derived forms: groundbreakings

See also: original

Type of: beginning, ceremony, commencement, start

Encyclopedia: Groundbreaking