/ braʊ; NAmE / noun
1.
( literary ) the part of the face above the eyes and below the hair
SYN forehead :
The nurse mopped his fevered brow.
Her brow furrowed in concentration.
2.
[ usually pl. ] = eyebrow :
One dark brow rose in surprise.
3.
[ usually sing. ] the top part of a hill :
The path disappeared over the brow of the hill.
—see also highbrow , middlebrow , lowbrow
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IDIOMS
see knit verb
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WORD ORIGIN
Old English brū eyelash, eyebrow , of Germanic origin. Current senses arose in Middle English ; compare with brae .