- innovative, innovational, groundbreaking - being or producing something like nothing done or experienced or created before; "stylistically innovative works"; "innovative members of the artistic community"; "a mind so innovational, so original"
Antonym: unoriginal (indirect, via original)
- groundbreaking, groundbreaking ceremony - the ceremonial breaking of the ground to formally begin a construction project
--1 is a kind of ceremony; beginning, start, commencement