From Longman Dictionary of Contemporary EnglishRelated topics: Jewellerytiarati‧a‧ra /tiˈɑːrə/ noun [countable]DCJa piece of jewellery like a small crown, that a woman sometimes wears on very formal or important occasions
a diamond tiaraExamples from the Corpustiara• Obediently, Martha studied the image of a glassy-eyed young white woman in a long white dress and tiara.• The pointedtiaraflashed as she moved.• And she's got the tiara to prove it.• Elton John: Go on, wear the tiara.• The tiara had not glittered in Nicandra's weddingveil.• Trytiaras and crowns and always wear hair below your jawline to create the illusion of length.• Both wore tiaras and sashes, which made me feel better about having put on a tie.Origintiara(1500-1600)Latin“hat worn by Persian kings”, from Greek