Meaning of “sew sth up” in the English Dictionary

"sew sth up" in British English

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sew sth up

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

(Definition of “sew sth up” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"sew sth up" in Business English

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sew sth up

informal
phrasal verb with sew uk /səʊ/ us verb

to complete something successfully:

He hopes to sew up the nomination by the end of the month.
get/have sth (all) sewn up He aims to have the first deal sewn up early next year.

disapproving to control something completely so that no one else has a share of it:

Our competitors have the adult market sewn up.

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