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English definition of “sew sth up”

sew sth up

verb uk phrasal verb with sew   /səʊ/ us    /soʊ/ (sewed, sewn or sewed)

(REPAIR)

to close or repair something by sewing the edges together: I've got to sew up that hole in your jeans. A nurse will come and sew up that wound for you soon.

(BE SUCCESSFUL)

[usually passive] informal If you have a competition or game sewn up, you are certain to win it or get control of it: The Democrats appear to have the election sewn up. to complete all the arrangements for a successful business agreement: It's going to take another week or two to sew up this deal.
(Definition of sew sth up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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