adj. Innovative; new, different; doing something that has never been done before.
n. A ceremony to mark the beginning of construction.
n. The point at which construction begins.
the GNU version of the Collaborative International Dictionary of English
n. The ceremonial breaking of the ground to formally begin a construction project. It is sometimes carried out by an official who digs the first spadeful of dirt from the ground, to begin the preparatory excavation work.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. being or producing something like nothing done or experienced or created before
n. the ceremonial breaking of the ground to formally begin a construction project
Word Usage
"Mrs. Obama said she was thrilled by passage of what she described as a groundbreaking piece of legislation."