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English definition of “reinforcement”

reinforcement

noun     /ˌriː.ɪnˈfɔːs.mənt/ US  /-ˈfɔːrs-/
[U] the act of making something stronger: The harbour walls need urgent reinforcement.Becoming and making stronger reinforcements [plural] soldiers sent to join an army to make it strongerParts of armies and groups of servicemen
(Definition of reinforcement noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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