Skip to main content
unwritten law

unwritten law

3 7.2
A rule people follow because of custom rather than being made by the government
  • noun
  • /ʌnˈrɪtən lɔ/
  • Specialized
translation icon : ley no escrita
  • There's such a thing as the unwritten law.

Examples

  • It's an unwritten law.

  • To outsiders, however, it is a curious system in which students must abide by an unwritten law allowing them to seek help and advice only from their assigned teacher.

    Academic text (1994)
  • By the way, which unwritten law do I come under?

  • I have the unwritten law on my side.

  • An unwritten law of the sea says I must make you welcome.

  • That is a violation of the unwritten laws of marriage.

  • People must learn the new unwritten law via painful experience.

    Blog text (2)
  • Custom, that unwritten law, has for years frowned upon any attempt by a woman to take such a step.

    Academic text (1995)
  • You break an unwritten law... ...you'll be an outcast.

  • In many cultures, there is an unwritten law that dictates respect for elders.

How Formal

law
1.0
statute
  • Formal
234 5.5
regulation
  • Formal
4.0
unwritten law
  • Specialized
3 7.2
convention
106 3.9
custom
148 1.3
habit
630 1.0

Surface Forms

unwritten law singular

Morphology

unwritten + law

The meaning is directly and transparently derived from the constituents: 'unwritten' (not written or not formally recorded) combined with 'law' (a rule) yields a rule that is not codified but observed. This adjective+noun composition follows standard, cross-linguistically common patterns, so a B1 learner who knows both words would readily infer the MWE meaning.

Etymology

Unwritten law comes from the simple image of an unwritten law — a rule told by older people and passed by word of mouth instead of being written down. So unwritten law means a 'rule' or 'custom' people follow even though it is not a formal law.