replacementrule
nounUK /rɪˈpleɪsmənt ruːl/
US /rɪˈpleɪsmənt ruːl/
A replacement rule is a rule that tells you what to use instead of something else.
The teacher made a replacement rule that says we use a pencil instead of a pen.
RELATED WORDS
OTHER MEANINGS
2. In math or logic, a rule that lets you swap one expression for an equal one.
We used a replacement rule to change x + x into 2x.
3. In language study, a rule that shows how one sound or word can take the place of another.
The replacement rule explains why 'cat' becomes 'cats' in the plural.
4. In games, a rule about using a new piece or card in place of an old one.
The board game has a replacement rule for when a token is lost.