LOWER (4)

Low″er (?), v. i. [imp. & p. p. Lowered (?); p. pr. & vb. n. Lowering.] [[OE. lowren, luren; cf. D. loeren, LG. luren. G. lauern to lurk, to be on the watch, and E. leer, lurk.]] 1. 1. To be dark, gloomy, and threatening, as clouds; to be covered with dark and threatening clouds, as the sky; to show threatening signs of approach, as a tempest.
All the clouds that lowered upon our house. Shak. 2. 2. To frown; to look sullen.
But sullen discontent sat lowering on her face. Dryden.