back-of-the-envelope

EnglishEdit

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EtymologyEdit

back +‎ of +‎ the +‎ envelope.

AdjectiveEdit

back-of-the-envelope

  1. (idiomatic) Approximate, rough, simplified.
    Do some back-of-the-envelope calculations before all the facts come in.
Last modified on 15 July 2013, at 20:06