scowl

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To wrinkle or contract the brow as an expression of anger or disapproval. See Synonyms at frown.
2. v. To express with a frowning facial expression.
3. n. A look of anger or frowning disapproval.

Century Dictionary and Cyclopedia

1. To lower the brows as in anger or displeasure; frown, or put on a frowning look; look gloomy, severe, or angry: either literally or figuratively.
2. To affect with a scowl: as, to scowl one down or away.
3. To send with a scowling or threatening aspect.
4. n. A lowering or wrinkling of the brows as in anger or displeasure; a look of anger, displeasure, discontent, or sullenness; a frown or frowning appearance or look.
5. n. Old workings at the outcrop of the deposits of iron ore. Some of these are of large dimensions, and are ascribed to the Romans.

Wiktionary

1. n. The wrinkling of the brows or face in frowning; the expression of displeasure, sullenness, or discontent in the countenance; an angry frown.
2. n. Hence, gloom; dark or threatening aspect.
3. v. To wrinkle the brows, as in frowning or displeasure; to put on a frowning look; to look sour, sullen, severe, or angry.
4. v. Hence, to look gloomy, dark, or threatening; to lower.
5. v. To look at or repel with a scowl or a frown.
6. v. To express by a scowl; as, to scowl defiance.

GNU Webster's 1913

1. v. To wrinkle the brows, as in frowning or displeasure; to put on a frowning look; to look sour, sullen, severe, or angry.
2. v. Hence, to look gloomy, dark, or threatening; to lower.
3. v. To look at or repel with a scowl or a frown.
4. v. To express by a scowl.
5. n. The wrinkling of the brows or face in frowing; the expression of displeasure, sullenness, or discontent in the countenance; an angry frown.
6. n. Hence, gloom; dark or threatening aspect.

WordNet 3.0

1. v. frown with displeasure
2. n. a facial expression of dislike or displeasure