To What?!?

The other day while I was lying in bed either falling asleep or waking up, I had the flash of insight that the phrase "to wit" means "to make a witticism." That is, one should use it only as a lead-in to a punchline: "The vet informed me that my prize-winning ewe was doomed to a life of incontinence. To wit: my sheep had lost her peep."

I looked it up today, and it turns out I'm wrong: "to wit" just means "namely."