Rm
Room
Example
I've been assigned rm 225 at the hotel. What's your rm number?
This page explains what the abbreviation "Rm" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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RM is an abbreviation for room that is typically used online to refer to a chat room. It may also be used in text messages to refer to any actual physical room, such as a bedroom or classroom. If the abbreviation is used in a text message it is most likely in reference to the location of a person.