treaty - definition and synonyms

noun [countable] 

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  1. an official written agreement between two or more countries. When national leaders negotiate a treaty, they discuss it before reaching agreement; and when they ratify a treaty, they give it their formal approval, usually by signing it or voting for it

    He had no difficulty in persuading parliament to approve the treaty.

    treaty on:

    a treaty on arms reduction

    treaty with:

    a trade treaty with New Zealand