The Commens Dictionary
Quote from ‘Letters to Lady Welby’
In regard to its relation to its signified interpretant, a sign is either a Rheme, a Dicent, or an Argument. This corresponds to the old division Term, Proposition, & Argument, modified so as to be applicable to signs generally. [—] A rheme is any sign that is not true nor false, like almost any single word except ‘yes’ and ‘no’, which are almost peculiar to modern languages. [—] A rheme is defined as a sign which is represented in its signified interpretant as if it were a character or mark (or as being so).