Based on the search results, there is no clear definition or explanation of what a "ruad weapon" is. The term "ruad" appears to be associated with a character named Ruad who is a smith in the Baldurs Gate video game series. It is possible that "ruad weapon" refers to a weapon that has been upgraded or forged by Ruad, but this cannot be confirmed without further context. Additionally, the term "ruad weapon" appears in unrelated contexts, such as in CapCut templates, which suggests that it may be a term used in a specific community or subculture.