It is currently used with the singular (like the term every in English). However, it occasionally occurs with the plural form in archaic structures indicating the unabridged edition of someone’s works or specifically his or her poems or short stories: …… összesművei / versei / költeményei / elbeszélései. See also the Usage notes at minden(“every”).
1Semhogy and semmint are conjunctions meaning “(rather) than”, “before” (as in inkább meghal, semhogy… ― he'll rather die than…). 2Valamint is now only used in the sense of “as well as” in enumerations. 3Mindeddig/-addig mean “up until this/that point” (= egészeneddig/addig). Csak following relative pronouns expresses “-ever”, e.g. aki csak(“whoever”); is after “any” pronouns emphasizes “no matter”: akármit is(“no matter what”).
összes in Bárczi, Géza and László Országh. A magyar nyelv értelmező szótára (“The Explanatory Dictionary of the Hungarian Language”, abbr.: ÉrtSz.). Budapest: Akadémiai Kiadó, 1959–1962. Fifth ed., 1992: →ISBN