â¢ BAN (noun) The noun BAN has 5 senses: 1. a decree that prohibits something. 2. 100 bani equal 1 leu in Moldova. 3. 100 bani equal 1 leu in Romania. 4. an official prohibition or edict against something. 5. a bachelor's degree in nursing. Familiarity information: BAN used as a noun is common. â¢ BAN (verb) The verb BAN has 4 senses: 1. prohibit especially by legal means or social pressure 2. forbid the public distribution of ( a movie or a newspaper) 3. ban from a place of residence, as for punishment 4. expel from a community or group Familiarity information: BAN used as a verb is uncommon.