Word parts rare + -ity Pronunciation (UK) IPA (key): /ˈrɛə.rə.ti/ (US) IPA (key): /ˈrɛr.ə.ti/ Audio (US)(file) Audio (AU)(file) Noun Singular rarity Plural rarities (countable) A rarity is something that is very rare. The rarity of something is how rare it is.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads