take the liberty of

take the liberty of doing something (formal)

to do something that will have an effect on someone else without asking their permission. I took the liberty of reserving us two seats at the conference. I hope that's all right by you. (usually in past tenses)

See also: liberty, take

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take the liberty of doing something

to do something without first getting someone's approval. I've taken the liberty of reserving a seat for you on tomorrow morning's flight to New York.

See also: liberty, take