Meaning of “tighten up on sth” in the English Dictionary

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"tighten up on sth" in Business English

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tighten up on sth

phrasal verb with tighten uk /ˈtaɪtən/ us verb [ I or T ]

to be more careful about a particular situation:

(Definition of “tighten up on sth” from the Cambridge Business English Dictionary © Cambridge University Press)