Of persons (†occasionally of animals), their looks, etc.: Frowning, scowling; angry-looking, gloomy, sullen.

Angry, sullen. Obsolete.

That frowns; gloomy; stern; disapproving, threatening.

That looks glum or sullen.

Of persons: Sullen, frowning; having an air of dejection or displeasure, esp. in to look glum; also to look glum on (a person, action, etc.).

That scowls; having a sullen or malignant expression of countenance.

Of the face, eyes, etc.: expressing negative emotion, esp. anger or dislike; sullen; frowning.

covered with a frown; made to look frowning.

Of a situation or prospect: foreboding, threatening; (of an expression or look) full of anger or hatred.

full of frowns.

Dark-browed, dark-faced; (also) frowning, scowling.

with bent brows, frowning (see 3).

having a habit of frowning.

Frowning.