/ɪk'strævəgənt; ɪk`strævəˇənt/
adj
1 (in the habit of) using or spending too much; (of actions) showing this tendency （惯于）奢侈的, 挥霍的; （指行为）放纵的
*an extravagant man 挥霍无度的人
* extravagant tastes and habits 奢侈的嗜好和习惯
* an extravagant use of natural resources 自然资源的滥用.
2 (of ideas, speech or behaviour) going beyond what is reasonable, usual or necessary （指想法、言行）放肆的, 越轨的, 过度的
*extravagant praise, behaviour, claims 过分的赞扬、放肆的行为、过高的要求
* pay extravagant compliments 过分夸奖.

adj
[Date: 1300-1400; Language: Medieval Latin;Origin:Latin vagans, present participle of vagari 'to wander about']
spending or costing a lot of money, especially more than is necessary or more than you can afford
　Would it would be too extravagant to buy both?
　an extravagant lifestyle
doing or using something too much or more than is necessary
extravagant with
　Don't be too extravagant with the wine.
　an extravagant display of loyalty
if someone makes extravagant claims, promises etc, they make big claims or promises that are not true or real
　extravagant claims about the drug's effectiveness
very impressive because of being very expensive, beautiful etc
　extravagant celebrations
>extravagantlyadv
>extravagancen [U and C]
　the extravagance of the Royal Palace
　His only extravagance (=the only expensive thing he bought) was fine wine.