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.
>>dcre+to
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.