老大 lǎodà A. adjective literary old ▸ 少小离家老大回 leave home young and return old B. noun ① （长子、长女） eldest child in a family ▸ 老大当兵，老二经商。 The eldest child is an army man and the second eldest child is a businessman. ② dialect （指船夫） chief crewman of a boat → 船老大③ （指帮会） chief ④ （第一名） number one ▸ 本行业的龙头老大 the number one in the industry C. adverb very ▸ 老大不愿意 be extremely unwilling (to do sth) ▸ 心里老大不痛快 feel very annoyed |