RELAXED 放松的, relaxed and not worried, or seeming not to care about something

漫不经心的，随随便便的，不放在心上的:

a casual manner

漫不经心的态度

His eyes were angry, though he sounded casual.

虽然他的话听起来漫不经心，但他的眼神是气愤的。

Marsha was quite casual about appearing on TV.

玛莎对于上电视很是无所谓。

She had a casual attitude to life.

她对待生活的态度很随便。

NOT FORMAL 不正式的, not formal or not for a formal situation

非正式的，随便的;

Jean felt more comfortable in casual clothes .

琼穿上便服感到更舒服。

a casual jacket

日常穿的外套

WORK 工作, employed as a temporary worker or working for only a short period of time

临时工，零工，短工:

casual labour

临时工

staff employed on a casual basis

临时雇用的员工

Chris has occasional casual work but mostly he is unemployed.

克里斯偶尔打点零工，但大多数时候他都没有工作。

RELATIONSHIP 关系, knowing someone or having sex with someone without wanting a close relationship with them

〔和某人的关系或性关系〕随便的，不认真的，感情不深的;

She will never be more than a casual acquaintance.

她从来就只是个泛泛之交。

They had been conducting a casual affair for years.

他们多年来一直保持着随便的婚外情。

John just wanted casual sex.

约翰只想要随便的性关系。

WITHOUT ATTENTION 不注意, without any serious interest or attention

漫无目的的，不认真的，随便的:

He gave us a casual glance as he walked by, but didn't stop.

他经过时随便地看了我们一眼，并没有停下来。

To the casual observer (=to someone who is not looking carefully) Mary seemed quite calm.

在不经意的旁观者看来，玛丽好像很平静。

NOT PLANNED 非计划好的, [only before noun] happening by chance without being planned

碰巧的，偶然的:

a casual conversation

随便的谈话

He made some casual remark (=one without thinking much about it) about her holiday.

他随口说了几句关于她度假的话。

NOT REGULAR 不定期的, [only before noun] doing something or using something sometimes but not regularly or often

不定期的，偶尔的;

a casual drug user

偶尔为之的吸毒者

The museum is of great interest, both to experts and to casual visitors.

这座博物馆很有意思，对专家和难得去一次的人来说都是如此。

a casually dressed young man

穿着随便的年轻人

'Where do you work?' she asked casually.

“你在哪里工作？”她随便一问。

He walked down the road, casually swinging his bag.

他走在路上，包随便地摆来摆去。