backside C2+ Topic:People & Society US /ˈbækˌsaɪd/ UK /ˈbækˌsaɪd/ See IPA manual Meanings 1 noun the rear part of something; a person's buttocks He slipped on the ice and landed squarely on his backside. Thesaurus Synonyms 1 noun · the rear part of something;... rearbuttocksbehindposteriorbottomrump ↔ Opposites front Word family Related forms backside Etymology AI details From back + side, an Old English-derived compound denoting the rear part, narrowed colloquially to the buttocks. bæc Old English sīde Old English View etymology graph -> Topics People & Society External links Cambridge Dictionary Wiktionary Google Images # backside **Type:** Word **Level:** C2+ **Part of speech:** noun **IPA (US):** /ˈbækˌsaɪd/ **IPA (UK):** /ˈbækˌsaɪd/ ## Meanings 1. the rear part of something; a person's buttocks ## Examples - He slipped on the ice and landed squarely on his backside. ## Synonyms - rear - buttocks - behind - posterior - bottom - rump ## Antonyms - front ## Related Forms - back - side ## Roots and Affixes - Root: bæc - Root: sīde ## Etymology From back + side, an Old English-derived compound denoting the rear part, narrowed colloquially to the buttocks. ## AI Etymology Backside is a noun meaning "the rear part of something; a person's buttocks". Historically, it is from back + side, an Old English-derived compound denoting the rear part, narrowed colloquially to the buttocks. The visible construction is part of the etymology: backside is not just an unanalyzed simple word. The historical chain links Old English bæc with Old English sīde. Close English family members include back, and side. ## Topics - People & Society markdown