A ship of not less than 20 guns, the command of which carried the rank of post captain. Compare earlier "ship of post".
Mid 18th century; earliest use found in Order-in-Council. From post + ship.
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。