general rule
nounUK /ˈdʒɛn.ər.əl ruːl/
US /ˈdʒɛn.ər.əl ruːl/
A general rule is a simple idea that helps you know what to do most of the time.
As a general rule, we wash our hands before we eat.
OTHER MEANINGS
2. A statement that is true in most situations but may have exceptions.
As a general rule, plants need sunlight to grow, though some can live in the dark.
3. A broad principle used to guide decisions rather than a strict law.
The teacher gave us a general rule for solving these math problems.
4. A usual way of doing things that most people follow.
It's a general rule in our house to be quiet after nine o'clock.