undisclosedrules
nounUK /ˌʌndɪsˈkləʊzd ruːlz/
US /ˌʌndɪsˈkloʊzd ruːlz/
Rules that are kept secret and not told to people.
The game had undisclosed rules, so nobody knew how to win.
RELATED WORDS
OTHER MEANINGS
2. Instructions that are not shared with everyone involved.
The club followed undisclosed rules that only members knew.
3. Terms kept private by an organization.
The contest was judged by undisclosed rules.
4. Guidelines that are not written down or announced.
Players were confused by the undisclosed rules of the match.