frown

Definitions:

To express displeasure by contracting the brow; to look displeased; to look threatening.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (verb, noun) (v. & n.) (verb, noun)
A wrinkling or contraction of the brow in displeasure, etc.: a stern look.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
To repel by a frown.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (verb) (v. t.) (verb transitive)
To express displeasure or anger by contracting the forehead; to scowl at or on.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (verb) (v.) (verb)
To wrinkle the brow; express anger by contracting the brow; show displeasure.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (verb) (v. i.) (verb intransitive)
To repel by expressing displeasure; to rebuke.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (verb) (v.) (verb)
A contraction of the forehead, expressing anger or dislike; a look expressing displeasure.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
A contraction of the brow.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (noun) (n.) (noun)
A knitting of the brows in displeasure; any expression of displeasure.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)
To rebuke by a stern look; to suppress by scowling.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (verb) (v. t.) (verb transitive)
To wrinkle the brow, as in anger: to look angry.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (verb) (v. i.) (verb intransitive)
A scowl; stern look.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
FROWNINGLY.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adverb) (adv.) (adverb)
To contract the brows as a result of displeasure, etc.; scowl; lower.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (verb) (v. i.) (verb intransitive)

Usage examples:

" Yes," she answered with a frown
- His Family by Ernest Poole
Why or to what end they desired it, I could not tell; but Darrell, who stood behind the priest, nodded his head to me with an anxious frown
- Simon Dale by Anthony Hope
Zoie looked up from her sewing with a frown
- Baby Mine by Margaret Mayo