1ADJ-GRADED [usually ADJ n](生活)放纵的,狂欢的,不羁的 If you say that someone has a riotous lifestyle, you mean that they frequently behave in a excessive and uncontrolled way, for example by eating or drinking too much. (生活)放纵的,狂欢的,不羁的 [formal]
...aristocrats who wasted their inheritances in riotous living.
2ADJ-GRADED [usually ADJ n](行为或事件)狂欢的,喧闹的,放纵的 You can describe someone's behaviour or an event as riotous when it is noisy and lively in a rather wild way. (行为或事件)狂欢的,喧闹的,放纵的
The dinner was often a riotous affair enlivened by superbly witty speeches.
宴会常常会因为一些非常诙谐的讲话而气氛活跃,热闹非凡。
...a riotous exhibition of boogie-woogie piano playing.
...a slapstick affair which I found riotously amusing.
让我觉得热闹有趣的一件滑稽事
3ADJ [ADJ n]色彩丰富的;五颜六色的;装饰华丽的 You can describe things as riotous when they are very colourful or decorative rather than plain or simple. 色彩丰富的;五颜六色的;装饰华丽的
...a riotous collection of gaudy and glamorous dresses.