From an ambiguous term: This is a redirect from an ambiguous page name to a page or list that disambiguates it. These redirects are pointed to by links that should always be disambiguated. Therefore, this template should never appear on a page that has "(disambiguation)" in its title – in that case use {{R to disambiguation page}} instead.
From a gerund: This is a redirect from a gerund (or gerund phrase), a verb form that ends with "ing" and that functions as a noun, to a related part of speech or topic.