- 老大爷 lǎodàyé grandpaa respectful form of address for an elderly man
- 老大哥 lǎodàgē big brother
- 老大娘 lǎodàniáng old ladya polite form of address or reference for an elderly woman
- 龙头老大 lóngtóulǎodà bossthe top leader or chief of a group or organization, often used in the context of gangs or underworld figures
- 老大不小 lǎodàbùxiǎo grown upno longer a child; already of age (idiom)
- 船老大 chuánlǎodà boatmasterthe person in charge of a boat, often a small commercial or fishing vessel, acting as skipper, coxswain, or boatswain
- 老大徒伤悲 lǎodàtúshāngbēi vain regretsvain regrets of old age (idiom)
- 老大妈 lǎodàmā auntieaffectionate term for an elderly woman; madam
- 以老大自居 yǐlǎodàzìjū acting superiorregarding oneself as number one in terms of leadership, seniority, or status
- 空心老大 kōngxīnlǎodà stuffed shirta pretentious and vacuous person
- 少壮不努力，老大徒伤悲 shàozhuàngbùnǔlì, lǎodàtúshāngbēi work hard youngif you are lazy in your prime, you'll be sorry in your old age
