essentialrule

noun

UK /ɪˈsenʃəl ruːl/

US /ɪˈsenʃəl ruːl/

A rule that you must always follow because it is very important.

Washing your hands before eating is an essentialrule in our house.

SYNONYMS

must-follow rule key rule basic rule vital rule core rule

RELATED WORDS

guideline principle requirement standard law

OTHER MEANINGS

2. A basic principle that something cannot work without.

Safety is an essentialrule for any playground.

3. A rule everyone agrees is necessary for fairness.

Taking turns is an essentialrule in the game.

4. A rule that is taught first because everything else depends on it.

Listening carefully is an essentialrule in class.