"a groundbreaking step" is a correct and usable phrase in written English.
It is typically used to describe a significant or innovative action or decision. Example: "The company's adoption of sustainable practices was a groundbreaking step in the industry."
It is a groundbreaking step for Hollywood.
This would be a groundbreaking step against Capitol Hill misbehavior.
It felt so much bigger than just being a cool part; this was a groundbreaking step".
"This is a groundbreaking step toward rapidly commercializing autonomous vehicle technology," said Mr. Vogt.
The iPhone was a groundbreaking step in fuelling mobile internet growth because its handset was so user-friendly, he said.
Terry Goddard, the Arizona attorney general, hailed the agreement as a "groundbreaking" step toward cracking down on smugglers and the money that keeps them in business.
Working from platforms and catwalks atop this new steel tower, Japanese engineers will soon begin extracting the No. 4 unit's fuel rods, in what the plant operator calls a delicate but groundbreaking step in a cleanup that is expected to take decades.
The company, which employs some 1,800 people at more than a dozen popular hot spots including the Gramercy Tavern and Union Square Cafe, said in a statement it arrived at the groundbreaking step "after a thoughtful, company-wide dialogue".
One sign of the shift was Bob Woodward's recent Washington Post story in which a Bush administration official took the groundbreaking step of calling torture "torture".
Perhaps the members of the Constitution in Exile should blame Abraham Lincoln (a Republican!), not Franklin Roosevelt, for the first groundbreaking step in the dismantling of their holy writ.
"This is a groundbreaking first step towards justice," said Beatrice Lindstrom of the Institute for Justice & Democracy in Haiti (IJDH), which is pursuing a class-action lawsuit against the UN to try to force it to accept responsibility for the disaster and to pay compensation.
