That is part of the definition given in the first paragraph of the Wikipedia article, but I think it’s a blurry line when the acquired company is essentially synonymous with a single open source project and the buyer wants the team of experts to continue developing that open source project.
The team is continuing to develop the open source project that was synonymous with the company, but they're explicitly no longer going to try to monetize it. I think that squarely counts as an acquihire according to common usage.
