i Register
In some senses, lour is marked as figuratively. Watch for register when choosing this word.
verb
To frown; to look sullen.
[...] Juno took her place: But ſullen Diſcontent ſat lowring on her Face.
And solace sought he none from priest nor leech, / And soon the same in movement and in speech, / As heretofore he fill'd the passing hours, / Nor less he smiles, nor more his forehead lours / Than these were wont; [...]
To be dark, gloomy, and threatening, as clouds; of the sky: to be covered with dark and threatening clouds; to show threatening signs of approach, as a tempest.
Now is the winter of our diſcontent, Made glorious ſummer by this ſonne of Yorke: And all the cloudes that lowrd vpon our houſe, In the deepe boſome of the Ocean buried.
And with them comes a third of Regal port, / But faded ſplendor wan; who by his gate / And fierce demeanour ſeems the Prince of Hell, / Not likely to part hence without conteſt; / Stand firm, for in his look defiance lours.
noun
A frown, a scowl; an angry or sullen look.
I have ſuch averſion to ill temper, that I could ſooner forgive my wife adultery, than croſſneſs. I cannot taſte Caſſio's kiſs on her lips; but I can ſee a lour on her brow.
Of the sky, the weather, etc.: a dark, gloomy, and threatening appearance.