From Longman Dictionary of Contemporary Englishldoce_053_bcorsagecor‧sage /kɔːˈsɑːʒ $ kɔːr-/ noun [countable] 
DCa group of small flowers that a woman fastens to her clothes on a special occasion such as a wedding
DCa group of small flowers that a woman fastens to her clothes on a special occasion such as a weddingExamples from the Corpus
corsage• It's a necklace so lavish it is almost a corsage.• I think it might be a corsage.• She even bought us some, we had corsages to go and everything.• She wore her corsage of violets and primroses pinned to the lapel of her grey suit.• But the necklace, or corsage - she did not know which - was heavy.• Michael Kors' taupe knit with prom corsage over chestnut satin. 12.Origin corsage (1800-1900) French “(part of a piece of clothing covering) the top part of the body”, from Old French cors; CORSE 