1
- attrib. only one; not one of several单一的, 单个的：
a single red rose
仅有的一朵红玫瑰
the kingdom was ruled over by a single family.
王国由单一的家族统治。
1.1
- regarded separately or as distinct from each other or others in a group个别的, 单个的：
she wrote down every single word
她把每一个词都写下
alcohol is the single most important cause of violence.
酗酒是暴力发生的最重要的单个原因。
1.2
- with negative even one (used for emphasis)甚至一个（用于强调）：
they didn't receive a single reply.
他们甚至连一个答复都未收到。
1.3
- designed or suitable for one person单人的, 一人适用的：
a single bed.
单人床。
1.4
- archaic not accompanied or supported by others; alone〈古〉单独的。
2
- unmarried or not involved in a stable sexual relationship未婚的, 单身的：
a single mother.
单亲妈妈。
3
- attrib. consisting of one part由一个部分构成的：
the studio was a single large room.
工作室就是一间大房子。
3.1
- Brit. (of a ticket) valid for an outward journey only, not for the return〈英〉（票）单程的。
3.2
- (of a flower) having only one whorl of petals（花）单瓣的。
3.3
- denoting an alcoholic drink that consists of one measure of spirits（酒的）一份：
a single whisky.
一份威士忌酒。
4
- archaic free from duplicity or deceit; ingenuous〈古〉独特的, 独有的; 公正的; 一心一意的; 独创的：
a pure and single heart.
一心一意的、纯洁的心。
1
- an individual person or thing rather than part of a pair or a group一个, 单一。
1.1
- a short record with one song on each side单曲唱片。
1.2
singles
people who are unmarried or not involved in a stable sexual relationship单身者, 未婚者：as modifier a singles bar.单身者酒吧。
1.3
- Brit. a ticket that is valid only for an outward journey〈英〉单程票。
1.4
- a bedroom, especially in a hotel, that is suitable for one person（尤指宾馆的）单人房。
1.5
- a single measure of spirits一份酒。
1.6
- US informal a one-dollar note〈美, 非正式〉一元纸币。
2
- a play that scores one point, in particular得一分的比赛动作, 尤指：
2.1
- Cricket a hit for one run【板球】一次击中。
2.2
- Baseball a hit which allows the batter to proceed safely to first base【棒球】一垒打。
3
singles
(especially in tennis and badminton) a game or competition for individual players, not pairs or teams（尤指网球和羽毛球的）单打比赛。
4
- （一般作singles）Bell-ringing a system of change-ringing in which one pair of bells change places at each round【鸣钟术】不同次序鸣钟法。
with obj.
1
single someone/thing out
choose someone or something from a group for special treatment挑选, 挑出：one newspaper was singled out for criticism.
一份报纸被挑出来批评。
2
- thin out (seedlings or saplings)对（幼苗, 幼树）进行间苗。
3
- reduce (a railway track) to a single line将（铁轨）变成单线。
4
- no obj. Baseball hit a single【棒球】击出一垒打。
4.1
- with obj. cause (a run) to be scored by hitting a single以一垒打使（跑垒）得分。
4.2
- with obj. advance (a runner) by hitting a single以一垒打使（跑垒员）进垒。
派生词
singleness
nounsingly
adverb词源
Middle English: via Old French from Latin singulus, related to simplus 'simple'.