Home Words wane wane n. Cite + Add to list US //ˈweɪn// UK //wˈeɪn// wane Archaic Literary Slang Astronomy Idioms1 entry01on the wanein a period of decrease or decline Related wordsaberrationalignmentalmaalmanacaltitudeamoramplitudean'tannumanomalyapertureapex Last updated April 21, 2026