unwritten rule

Understood social norm

An unwritten rule is a behavioral expectation understood within a group but never formally stated or codified.

These conventions govern social situations through shared understanding rather than explicit instruction: There's an unwritten rule that you don't take the last donut without offering to split it.

Unwritten rules often carry as much force as official ones.

Opposites
codification status

unwritten rulewritten law

Enacted and recorded legislation

statute · law · legislation · ordinance · bylaw

enforcement mechanism

unwritten rulelegal mandate

Law-required duty

criminal law · contractual obligation · judicial ruling · decree · edict

formality and enforcement

unwritten rulelaw

Binding principle or regulation

legislation · regulation · ordinance · mandate · decree

Family

rule, writer, writing, rules, written, wrote, writes, writers, writings

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G