老[lǎo] 基本解释：
新英汉大词典：
- 老[lǎo]
- 形容词- （年岁大） aged; old:
old woman;老妪
old farmer;老农
- （很久以前就存在的） of long standing; old:an old acquaintance;老相识
a chronic ailment; an inveterate habit [disease];老毛病
- （陈旧） old; outdated:old-fashioned; outmode老式样
- （原来的） traditional; old:traditional rules;老规矩
old stuff老货
- （蔬菜长得过了适口的时期） overgrown:tough bamboo shoots;老笋
overgrown spinach老菠菜
- （食物火候大） hardened; tough:have it well-done;炸老一点
The eggs are overcooked [too tough].鸡蛋煮老了。
- （颜色深） (of colour) dark; deep:deep green;老绿色
dark red;老红
- （排行在末了的） the youngest:the youngest son老儿子
- （老朽; 无用） decrepit; useless:an ultraconservative;老古板
a good-for-nothing老废物
- 名词- （老年人 ） old people:
respect the aged and love the young尊老爱幼
- （老子的简称） short for Lao Zi -- the founder of Taoism:Lao Zi and Zhuang Zi老庄
- （姓氏） a surname:Lao Ma老麻
- 动词- （变老） become old:
show signs of age year by year一 年年地见老了
- （指老人死亡） die:My grandfather died yesterday evening.爷爷昨晚老了。
- 副词- （长久） long:
He hasn't been here for a long time.他老没来。
I haven't seen you for ages.老没见你啊。
- （经常） always (doing sth.):He couldn't get his mind off the matter.他老惦记着这件事。
She is always talking about her children.她老念叨着孩子们。
- （很; 极） very:far away;老远
very high老高
- [前缀] （用于称人、排行次序、某些动、植物名）:Lao Zhang;老张
the third child or brother;老三
例句与用法：
A chance meeting brought the two old friends together again.
This is no other than my old friend, John.
Don't trust him, he is a sly old fox.
I'm duty bound to visit my old aunt.
Don't play old tricks!
Let's get rid of this mouldy old furniture.
He told us a hoary old joke that we'd all heard many times before.