Definition of Rule of thumb

a general rule for a particular situation

Examples of Rule of thumb in a sentence

As a rule of thumb, the teacher doesn’t give extra credit assignments to any students.  🔊

By rule of thumb, children under the age of 12 are not allowed to swim in the pool unsupervised.  🔊

A good rule of thumb when it comes to exercise is that you get at least 30 minutes of cardio a day.  🔊

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