Meaning of “back sb/sth up” in the English Dictionary

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"back sb/sth up" in Business English

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back sb/sth up

phrasal verb with back uk /bæk/ us verb [ T ]

to provide support for someone or something:

His warning of the need for good economic housekeeping was backed up by a record current account deficit of £72bn.
She's backed up by a dedicated team of administrators.

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