That progresses, operates, moves, etc., efficiently, freely, or smoothly.
Early 17th century; earliest use found in William Lisle (c1569–1637), translator and Anglo-Saxon scholar. From well + going.
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。