| 老当益壮 | lǎo dāng yì zhuàng | old but vigorous (idiom); hale and hearty despite the years |
| 老皇历 | lǎo huáng lì | lit. last year's calendar (almanac); fig. ancient history; obsolete practice; old-fashioned principle |
| 老眼昏花 | lǎo yǎn hūn huā | blurred vision of an old person (idiom) |
| 老神在在 | lǎo shén zài zài | calm and easy-going (Taiwanese) |
| 老茧 | lǎo jiǎn | callus (patch or hardened skin); corns (on feet); also 老趼 |
| 老耄 | lǎo mào | dim sight of the aged; doddering; senile |
| 老脸 | lǎo liǎn | self-respect of old person; face; thick-skinned (i.e. impervious to criticism); brazen |
| 老旧 | lǎo jiù | outmoded; old-fashioned |
| 老舍 | Lǎo Shě | Lao She (1899-1966) famous Chinese novelist |
| 老花 | lǎo huā | presbyopia |
| 老庄 | Lǎo Zhuāng | Laozi and Zhuangzi (or Lao-tze and Chuang-tze), the founders of Daoism |
| 老着脸 | lǎo zhe liǎn | shamelessly |
| 老虎伍兹 | Lǎo hǔ Wǔ zī | Eldrick "Tiger" Woods (1975-), American golfer |
| 老虎机 | lǎo hǔ jī | slot machine |
| 老虎钳 | lǎo hǔ qián | vise; pincer pliers |
| 老处女 | lǎo chǔ nǚ | unmarried old woman; spinster |
| 老街 | Lǎo jiē | Lao Cai, Vietnam; Laokai or Laukkai, Burma (Myanmar) |
| 老调重弹 | lǎo diào chóng tán | to play the same old tune (idiom); unoriginal |
| 老谋深算 | lǎo móu shēn suàn | rigorous schemes and deep foresight (idiom); astute and circumspect |
| 老谱 | lǎo pǔ | old ways; old habit |
| 老资格 | lǎo zī gé | veteran |
| 老账 | lǎo zhàng | lit. old account; old debt; fig. old scores to settle; old quarrels; old grudge |
| 老趼 | lǎo jiǎn | callus (patch or hardened skin); corns (on feet) |
| 老辣 | lǎo là | shrewd and ruthless; efficient and unscrupulous |
| 老迈 | lǎo mài | aged; senile |
| 老边 | Lǎo biān | Laobian district of Yingkou City 营口市, Liaoning |
| 老边区 | Lǎo biān qū | Laobian district of Yingkou City 营口市, Liaoning |
| 老饕 | lǎo tāo | glutton |
| 老马嘶风 | lǎo mǎ sī fēng | old horse sniffs the wind (idiom); fig. aged person with great aspirations |
| 老马恋栈 | lǎo mǎ liàn zhàn | lit. the old horse loves his stable; fig. sb old but reluctant to relinquish their post (idiom) |
| 老马识途 | lǎo mǎ shí tú | an old horse knows the way (idiom); an experienced worker knows what to do; an old hand knows the ropes |
| 老骥 | lǎo jì | old thoroughbred; fig. aged person with great aspirations |
| 老骥伏枥 | lǎo jì fú lì | lit. an old steed in the stable still aspires to gallop 1000 miles (idiom); fig. aged person with great aspirations |
老骥伏枥，
志在千里 | lǎo jì fú lì ,
zhì zài qiān lǐ | lit. an old steed in the stable still aspires to gallop 1000 miles (idiom); fig. old people may still cherish high aspirations |
| 老骥嘶风 | lǎo jì sī fēng | old steed sniffs the wind (idiom); fig. aged person with great aspirations |
| 老鸟 | lǎo niǎo | old hand; veteran |
| 老鸹 | lǎo guā | a crow |
| 老雕 | lǎo diāo | vulture |
| 老鹰 | lǎo yīng | eagle (colloquial) |
| 老鹰星云 | Lǎo yīng xīng yún | Eagle or Star Queen Nebula M16 |
| 老鼠尾巴 | lǎo shǔ wěi ba | lit. rat's tail; fig. a follower of inferior stature |
老鼠拖木锨，
大头在后头 | lǎo shǔ tuō mù xiān ,
dà tóu zài hòu tou | when the mice drag a shovel, the biggest thing comes second; the tip of the iceberg; the cockroach principle |
| 老鼠洞 | lǎo shǔ dòng | mouse hole |
| 老鼻子 | lǎo bí zi | many |
| 老龄 | lǎo líng | old age; aging; aged; geriatric; the aged |
| 老龄化 | lǎo líng huà | ageing (population) |
| 圣诞老人 | Shèng dàn Lǎo rén | Father Christmas; Santa Claus |
| 臭老九 | chòu lǎo jiǔ | stinking intellectual (contemptuous term for educated people during the Cultural Revolution) |
| 船老大 | chuán lǎo dà | coxswain; steersman; boatswain (bo'sun) |
| 庄老 | Zhuāng Lǎo | Zhuangzi and Laozi, the Daoist masters |
