(A member of) a body of guards assigned to protect a palace, or a monarch or other sovereign ruler.
Mid 18th century; earliest use found in John Durant Breval (?1681–1738), writer.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。