stationaryrule
nounUK /ˈsteɪ.ʃən.ər.i ruːl/
US /ˈsteɪ.ʃə.ner.i ruːl/
A stationary rule is a rule that stays the same and does not change.
The teacher said the stationary rule about raising your hand will never change.
RELATED WORDS
OTHER MEANINGS
2. A rule in a game or sport that is not allowed to be altered during play.
The stationary rule of the board game says you cannot move twice in one turn.
3. A written guideline that remains in force until officially replaced.
The company's stationary rule on safety gear stays active until a new one is posted.
4. A principle in mathematics or science that holds true without variation.
The stationary rule of the pendulum's period surprised the young scientists.