weak Meaning, definition in Cambridge English Dictionary
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Meaning of "weak" - English Dictionary

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weakadjective

uk   us   /wiːk/

weak adjective (NOT STRONG)

B1 not strong, or not strong enough to work, last, succeed, persuade, or be effective: It's not surprising you feel weak if you haven't eaten properly for days. The electromagnetic field strength becomes weaker as you move further away from high voltage cables. He was a weak king surrounded by corrupt advisers. Any evidence that exists to support the hypothesis is fairly weak. He gave the weakest of excuses when asked why he was late.B2 A weak drink contains a lot of water compared to its other contents, so that it does not have a strong flavour: I can't stand weak coffee/tea. specialized chemistry A weak acid, alkali, or chemical base does not produce many ions (= atoms with an electrical charge) when it is dissolved in water.
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weak adjective (NOT GOOD)

B1 not good enough, especially in ability, skill, or quality: He was always weak at/in languages but strong at/in science. Our quiz team is a bit weak on sport. In the end I think the film was spoilt by a weak story line.
weakly
adverb uk   us   /-li/
"The pain seems to have eased a little with these new tablets," he said weakly.
(Definition of weak from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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