Chiefly in representations of the English of a French speaker: yes, of course, indeed, certainly.
Late 18th century. From French mais oui, lit. ‘but yes’ from mais but + oui.
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。