adj (1)单(唯)一的，一个的(one only;one and no more)[作attrib]：The spider hung on a～thread.蜘蛛挂在一根丝上。The old man's～pleasure is walking. 那位老人唯一的乐趣就是散步。 answer in a～word 用一个字回答;Hardly a～man was to be seen on the street. 街上几乎看不见一个人。

(2)单人的(for one person only)[作attrib]：a～bed/mattress/sheet 单人床/床垫/床单;reserve a～room at a hotel 在旅馆预定一个单人房间;〖反〗double;

(3)未婚的，单身的(not married)：a～man/woman 单身男/女人;lead a～life 过独身生活;remain～仍然单身; She is still～. 她还是单身一人。〖反〗married;

(4)独特的(separate from others;distinct)：the most important～invention 独一无二的最重要的发明;

(5)单程的(be used on one journey only)[作attrib](= AmE one-way)：a～ticket to London 一张去伦敦的单程票;〖反〗return;

(6)专一的，真诚的(honest;sincere)：devote oneself with a～mind to ... 一心一意献身于……; a～heart 赤诚的心;

in single file 排成一列纵队：walk in～file 排成一列纵队行进;

n(1)单程票(single ticket)[C](infml)：two first-class～s to London 两张去伦敦的头等舱(车厢)单程票;

(2)单打(game with only one person on each side)[通常pl，接sing v]：play～s 进行单打比赛;men's/women's～s 男/女子单打;a～s tennis match 网球单打比赛;

→͵single-′breasted adj 单排扣的;͵single-′decker n 单层公共汽车;͵single-′handed adj & adv 单独的(地);͵single-′hearted adj 真诚的，忠心的;͵single-′minded(ly) adj (adv)专一的(地)，一心一意的(地);͵single-′parent adj 单亲的;͵single-′track adj 单轨的;′singleness n 单一(身)，专一;′singly adv 单独(身)地，一个一个地;

vt 挑选出(pick out from others)[T+n+adv(out)]：The teacher～d Harry out from the students for special praise. 老师把哈利单独提出来进行特殊表扬。