Definition of "acquainted"

Suppoſe, therefore, a Perſon to have enjoy'd his Sight for thirty Years, and to have become perfectly well acquainted with Colours of all kinds, excepting one particular Shade of Blue, for Inſtance, which it never has been his Fortune to meet with.

1748, [David Hume], “Essay II. Of the Origin of Ideas.”, in Philosophical Essays Concerning Human Understanding, London: […] A[ndrew] Millar, […], page 26

I have been one acquainted with the night.I have walked out in rain—and back in rain.I have outwalked the furthest city light.

1927, Robert Frost, “Acquainted with the Night”, in The Poems of Robert Frost: […], New York, N.Y.: The Modern Library, published 1946, stanza 1