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English definition of “sharp”

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sharp

adjective uk   /ʃɑːp/ us    /ʃɑːrp/

sharp adjective (ABLE TO CUT)

B1 having a thin edge or point that can cut something or make a hole in something: a knife with a sharp edge/blade. sharp teeth/claws/fingernails The point of this pencil isn't sharp enough.C2 producing or describing a quick, strong pain that makes you feel like you have been cut: She nudged me with a sharp elbow, to tell me to be quiet. I have this sharp pain in my chest, doctor. used to describe a part of someone's face that is very pointed: a thin face with a sharp nose If someone is sharp or makes a sharp statement, they speak or act in a severe and angry way that can hurt other people: He was rather sharp with me when I asked him to help. The government's proposals came in for some sharp criticism.
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sharp adjective (SUDDEN)

B2 happening suddenly, quickly, and strongly: a sharp drop in temperature a sharp decline in the standard of living a sharp rise/increase in the number of cases of this illness a sharp bend in the road to suffer a sharp blow to the head
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sharp adjective (TASTE)

sour in taste: Lemons have a sharp taste. This cheese is rather sharp.
Synonym

sharp adjective (CLEAR)

C1 clear; easy to see or understand: This TV gives a very sharp picture. The mountains stood in sharp contrast to the blue sky. There is a sharp distinction between crimes which involve injury to people and those that don't. It was a sharp reminder of how dangerous the world can be.

sharp adjective (CLEVER)

B2 mainly approving clever or quick to notice things: Birdwatchers need to have sharp ears and eyes. She has a sharp eye for a bargain. Our new director is very sharp. She manages to combine a sharp mind/intellect with a sympathetic manner. He was a man of sharp wit/sharp-witted man who always spoke his mind. The play was full of sharp one-liners. US He may be old but he's still as sharp as a tack.

sharp adjective (FASHIONABLE)

informal fashionable: Tony is a very sharp dresser. a sharp-suited business executive
sharpness
noun [U] uk   /ˈʃɑːp.nəs/ us    /ˈʃɑːrp-/
She has a remarkable sharpness of mind. the sharpness of a photograph/image

sharp

adverb uk   /ʃɑːp/ us    /ʃɑːrp/

sharp adverb (SUDDENLY)

C1 suddenly or immediately: After the church, turn sharp left/right.

sharp adverb (EXACTLY)

C1 exactly at the stated time: The performance will start at 7.30 sharp.

sharp

adjective, adverb uk   /ʃɑːp/ us    /ʃɑːrp/
higher than the correct or stated musical note: The E string on my guitar is a bit sharp. This concerto is in the key of C sharp (= the set of musical notes a semitone higher than the one based on the note C). to sing sharp

sharp

noun [C] uk   /ʃɑːp/ us    /ʃɑːrp/
(a symbol for) a note that is a semitone higher than the stated note
(Definition of sharp from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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