adjective, idiom, noun, pronoun, adverb · old (of people); venerable

他年纪很大，已经很老了。

adjective, noun, proper name, particle · prefix used before a surname, a numeral indicating birth order, or to show familiarity

老王是我的好朋友。

adjective, particle, noun, measure word, verb, modal particle · experienced; of long standing

他是厂里的老工人。

adjective, measure word, numeral · referring to things that have existed for a long time; vintage or classic

我喜欢老歌。

adverb, adjective · always; all the time

他老是想家。

adjective · tough (of meat, etc.); overcooked

牛肉煮得太老了。

adverb, adjective · very; extremely (as an adverb of degree)

他老远就看见了我。