By rule of thumb

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  • Fernita

    Senior Member
    castellano de Argentina.
    Hello everybody!
    What does this idiom mean?
    the rule of thumb is a rough practical method of measuring something usually based on past experience rather than on exact measurement and therefore not completely reliable in every case or in every detail.
    Example: As a rule of thumb, you should cook the chicken for 20 minutes for each pound that it weighs. (taken from the Oxford Diccionary)



    Senior Member
    U.S. English
    In other words, the phrase rule of thumb is used for any procedure or way of thinking that does the job without scientific precision.
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