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English definition of “nail sb down”

nail sb down

informal
verb uk phrasal verb with nail   /neɪl/ us  
to make someone give you exact details or a firm decision about something: They nailed him down to a specific time and place.Questioning people and asking questions in generalCuriositySuspecting and questioning
(Definition of nail sb down from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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