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English definition of “smack”

smack

verb uk   /smæk/ us  
[T] to hit someone or something forcefully with the flat inside part of your hand, producing a short, loud noise, especially as a way of punishing a child: I never smack my children. I'll smack your bottom if you don't behave yourself. [I or T, usually + adv/prep] to hit something hard against something else: I smacked my head on the corner of the shelf. She smacked her books down on the table and stormed out of the room.
Phrasal verbs

smack

noun uk   /smæk/ us  

smack noun (HIT FORCEFULLY)

[C] a hit from someone's flat hand as a punishment: You're going to get a smack on the bottom if you don't stop being such a naughty boy. [C] informal a hit given with the fist (= closed hand): I gave him a smack on the jaw. [C] a short, loud noise: She slammed her case down on the desk with a smack. [C] informal a loud kiss: a big smack on the lips

smack noun (DRUG)

[U] slang heroin (= a strong illegal drug): How long has she been on smack?

smack

adverb uk   /smæk/ (UK also smack bang, US also smack dab) us  

smack adverb (EXACTLY)

exactly in a place: She lives smack in the middle of London.

smack adverb (DIRECTLY)

directly and forcefully, producing a short, loud noise: I wasn't looking where I was going and walked smack into a lamppost.
(Definition of smack from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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