1 that has existed for a long time; connected with past times 古老的；与古代有关的: This house is quite old. 这房子相当古老了。old ideas/traditions 老思想╱传统In the old days, people generally had larger families than nowadays. 过去，人们生养的子女一般要比如今的多。 [OPP] new or modern 反义词为new或modern

2 (used about people and animals) having lived a long time （指人或动物）老的，年老的，年迈的: My mother wasn't very old when she died. 母亲去世时并不很老。He's only 50 but he looks older. 他只有50岁，但看起来要老一些。to get/ growold 年事渐高 [OPP] young 反义词为young

3 (used with a period of time or with how) of a particular age （与一段时间或与how连用）某年岁的: That building is 500 years old. 那座建筑有500年历史了。The book is aimed at eight- to ten-year-olds. 这本书的对象是八至十岁的孩子。How old are you? 你几岁了？ ☞Look at the note at age ¹. 参看age^1的注释。 ☞ Older and oldest are the usual comparative and superlative forms of old My father's older than my mother. I'm the oldest in the class. Elder and eldest can be used when comparing the ages of people, especially members of a family. However they cannot be used with than. old的比较级和最高级一般为older及oldest：My father's older than my mother.我父亲比母亲年纪大。·I'm the oldest in the class.我在班上是年纪最大的。elder及eldest用于比较年岁，尤常用于家庭成员，但不与than连用。

4 the old noun [pl] old people 老人；老年人 ☞Look at the elderly and the aged. 参看the elderly及the aged。

5 having been used a lot 旧的；陈旧的；破旧的: I got rid of all my old clothes. 我把我的旧衣服都处理掉了。 [OPP] new 反义词为new ☞Look at second-hand. 参看second-hand。

6 (only before a noun 只用于名词前) former; previous 以前的；先前的: I earn more now than I did in my old job. 我现在的工作比以前那份赚的钱多。

7 (only before a noun 只用于名词前) known for a long time 熟悉的；认识已久的: She's a very old friend of mine. We knew each other at school. 她是我的老朋友，我们学生时代就相识了。

8 (only before a noun 只用于名词前) (informal 非正式) used for emphasizing that sth has little importance or value （强调某事并不重要的或价值不大的）: I write any old rubbish in my diary. 什么小事我都记在日记里。