A lot is actually going on with this idea of "as they define it." McConnell even brings it up:
...
DeBar made the remarks in an interview with Press TV on Saturday after McConnell (R-Ky.) said that US aid to Ukraine is a “direct investment” in the country’s interests and against Russian President Vladimir Putin’s “war machine” on the first anniversary of Russia’s war with Ukraine.

He said that US national security is tied to stability and security in Europe and preventing Russian forces from advancing in the continent.

“As my fellow leading Republicans and I have explained, it is not an act of charity for the United States and our NATO allies to help supply the Ukrainian people’s self-defense,” he said. “It is a direct investment in our own core national interests.”

McConnell pointed out that the United States has largely been sending older weapons from its stockpile to Ukraine.

“If Putin were given a green light to destabilize Europe, invading and killing at will, the long-term cost to the United States in both dollars and security risks would be astronomically higher than the miniscule fraction of our GDP that we have invested in Ukraine’s defense thus far,” he said.

He urged the Biden administration to act more resolutely in ensuring that its military assistance to Ukraine and investments happen at the “speed of relevance.”

“The road to peace lies in speedily surging Ukraine the tools they need to achieve victory as they define it,” said the Kentucky Republican.
...

It may be the case that McConnell is providing hard rhetoric while still couching it in "how they define victory." but it seems likely that he really wants a forever war.

After all, he's a republican.

As was stated in a previously posted article, the republican base is actually rejecting a lot of the war talk at this point. McConnell is likely attempting to rally them.

Sen. McConnell 'summons the demons of global war': Journalist

Mitch McConnell should be removed from office as “a threat to peace” and the survival of humanity by pushing the US towards war with Russia, an American journalist has said.

^PressTV