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English definition of “fill (sth) up”

fill (sth) up

verb uk phrasal verb with fill   /fɪl/ us  
B1 to become full, or to make something become full: The seats in the hall were filling up fast. As she read the poem, their eyes filled up with tears.Filling and completing
(Definition of fill (sth) up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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