oldster

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++old·ster /ˈəʊldstə $ ˈoʊldstər/ noun [countable] informal  OLD/NOT YOUNGan old person 老家伙，老年人

Examples from the Corpus

oldster• But the oldster in me keeps worrying about people getting hurt.• The oldsters have had their quota.• Every long table is filled with oldsters in their golden years costumes-juvenile ensembles of short pants, shirts, and sneakers.

old·ster nounChineseSyllable  

old person an Corpus

oldster
old‧ster /ˈəʊldstə $ ˈoʊldstər/ noun [countable] informal
an old person

old·sterBrE /ˈəʊldstə(r)/ 🔊NAmE /ˈoʊldstər/ 🔊 noun (informal) an old person 老人；老者