Definition of gladiolus noun from the Oxford Advanced American Dictionary

 

gladiolus

 noun
noun
NAmE//ˌɡlædiˈoʊləs//
 
(pl. gladioli
NAmE//ˌɡlædiˈoʊlaɪ//
 
)
 
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a tall garden plant with long, thin leaves and brightly colored flowers growing up the stem
See the Oxford Advanced Learner's Dictionary entry: gladiolus