noun
a practical and approximate way of doing or measuring something
-
In engineering, a common rule of thumb is to use a safety factor of at least 2.
-
A good rule of thumb for cooking pasta is to use 1 liter of water for every 100 grams of pasta.
-
The rule of thumb for picking the best produce is to go for the ones that look the freshest.
-
When it comes to relationships, a good rule of thumb is to always communicate openly and honestly.