/ ɪkˈstrævəgənt; NAmE / adjective
1.
spending a lot more money or using a lot more of sth than you can afford or than is necessary :
I felt very extravagant spending £100 on a dress.
She's got very extravagant tastes.
Residents were warned not to be extravagant with water, in view of the low rainfall this year.
2.
costing a lot more money than you can afford or is necessary :
an extravagant present
3.
( of ideas, speech or behaviour ) very extreme or impressive but not reasonable or practical
SYN exaggerated :
the extravagant claims / promises of politicians
► ex·trava·gant·ly adverb :
extravagantly expensive
extravagantly high hopes
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WORD ORIGIN
late Middle English (in the sense unusual, unsuitable ): from medieval Latin extravagant- diverging greatly, from the verb extravagari , from Latin extra- outside + vagari wander.