English Adjective slie Obsolete spelling of sly. 1591, Ed[mund] Sp[enser], “Prosopopoia. Or Mother Hubberds Tale.”, in Complaints. Containing Sundrie Small Poemes of the Worlds Vanitie. […], London: […] William Ponsonbie, […], →OCLC:the slie foxe Anagrams isle, Iles, Lise, leis, %iles, sile, Sile, Elis, lies, iles, Isle, ELIs, Leis Norwegian Nynorsk Etymology 1 Adjective slie definite singular of sli plural of sli Etymology 2 Verb slie (dialectal) supine of slåWikiwand - on Seamless Wikipedia browsing. On steroids.