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English definition of “strengthen”

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strengthen

verb [I or T] uk   /ˈstreŋ.θən/ us  
B2 to make something stronger or more effective, or to become stronger or more effective: They have been strengthening their border defences in preparation for war. His battle against cancer has strengthened his belief in God. The accident strengthens the case for better safety measures at fairgrounds. The bank loan has greatly strengthened our financial position. The organization's aim is to strengthen the cultural ties between Britain and Germany. The rise in US interest rates caused the dollar to strengthen (= increase in value) against all the Asian currencies.
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(Definition of strengthen from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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