Meaning of “extravagant” - Learner’s Dictionary

extravagant

adjective us uk /ɪkˈstrævəɡənt/
WASTING MONEY

costing too much or spending a lot more money than you need to:

the extravagant lifestyle of a movie star
NOT ACCEPTABLE

too unusual and extreme to be believed or controlled:

the extravagant claims made by cosmetics companies
extravagance noun [ C, U ] us uk /ɪkˈstrævəɡəns/

extravagant behaviour

extravagantly adverb

(Definition of “extravagant” from the Cambridge Learner’s Dictionary © Cambridge University Press)