charter member
noun [ C ] mainly US uk/ˈtʃɑː.tə ˌmem.bər/ us/ˈtʃɑːr.t̬ɚ ˌmem.bɚ/
（社团或公司的）创始成员
a member of an organization who helped start the organization or became a member when it began
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。