Rule of thumb

Pronunciation: /ˈɹuɫ ˈəv ˈθəm/

Rule of thumb (noun)

  1. A simple method for making a good estimate or decision when you do not have exact information.
  2. A general guideline used to judge something approximately, especially in study or work.

Examples

  • A rule of thumb helps you estimate quickly.
  • This rule of thumb guides your first attempt.