Cardinal rule
/ˈkɑːrdɪnəl ruːl/
A cardinal rule is a basic, essential guideline that should be followed.
Examples
- They had ignored the cardinal rule, and the project failed.
- We will be breaking the cardinal rule if we skip the inspection.
- She always followed the cardinal rules of safety.
- He has been teaching the cardinal rule for years.
- The cardinal rule of cooking is to season early.
Meanings