informatory
/ɪnˈfɔːmət(ə)ri
/adjective
1Giving information; informative.Many motorists do not know the differences between mandatory, cautionary and informatory traffic signs....
- All the three types of road and traffic signs are included under three heads such as mandatory, warning and informatory towards the end.
- Our institution produces informatory notes on engineering related subjects as the need arises.
1.1 Bridge (Of a double) intended to convey information to one’s partner rather than to score a penalty.There are many informatory doubles that anticipate a bid from partner....
- If there is no intervening bid, you must bid your longest unbid suit unless you can convert the informatory double to a penalty double.
Origin
Late Middle English (but rare before the late 19th century): from Latin informat- 'shaped, described' (from the verb informare) + -ory2.