The phrase "mere rumor" means that something is only a piece of information that people are talking about, but it is not confirmed or proven to be true. Full definition
Now mere rumours have been upgraded to certifications.The Malaysian certification body, SIRIM, has just... Read more (pocket-lint.com)
United can't afford for that speculation to remain mere rumour and gossip ahead of a crucial summer. (caughtoffside.com)
Akufo - Addo's reputation as an alleged drugs user moved from mere rumours to the level of being given official recognition through being noted in several official United States of America secret cables leaked by the whistle - blowing website, wikileaks a few years ago. (ghanapoliticsonline.com)