adj(1)偶然的，意外的(happening by chance;not planned)[尤作attrib]：a～meeting/encounter/visit偶遇/意外遭遇/偶然拜访;〖同〗accidental，unexpected，unplanned，chance;〖反〗 intentional，planned，calculated，fixed，arranged，expected;

(2) 1)随便地，不经心地(made or done without much care or thought)[尤作attrib]：discover sth because of a～remark因为随便说的一句话而发现什么; 2)不认真(细致)的，马虎的，粗心大意的(not serious or thorough)[尤作attrib]：take a～glance at a book漫不经心地在书上扫了一眼;give sb a～look随便看某人一眼;have a～interest in golf对打高尔夫球兴趣不大;a～inspection 马马虎虎的检查;a～observer/reader不经心的观察者/读者; 3)漠不关心的，不负责任的(showing little interest;unconcerned;irresponsible)(derog)：His attitude/behaviour is rather～.他的态度/行为很不负责任。a～manner/air随随便便的样子/神态;a～host不热情的主人;

(3)1)随便的，非正式的((of clothes) not formal;suited for everyday wear or use)：～wear/clothes/dresses/attire随便的穿戴/衣服/服装/服装;Her clothes were too～for the occasion.她的衣着对于这种场合太随便了。〖同〗informal;2)随便的，不拘礼节的(without ceremony or formality)：address sb in a～way 随便地对某人说话;

(4)临时的，不规律的(not regular or permanent;part-time)[作attrib]：a～labourer临时工;employ～labours雇短工;take on～work打短工;～sex偶尔的两性关系;

(5)不密切的(not close or intimate)：a～friendship交情不深的友谊;

(6)表面(不深)的(superficial)[作attrib]：a～acquaintance点头之交;

→′casually adv 偶然(意外)地;随便(马虎，冷漠)地;临时地;′casualness n 意外;随便;

n(1)随便的衣着(informal clothes，esp men's slip-on shoes)[pl];

(2)临时工(person employed for a short period of time)[C]：He is a～.他是个临时工。