缩略语。“三老”指对待革命事业，要当老实人，说老实话，办老实事；“四严”指干革命工作，要有严格的要求，严密的组织，严肃的态度，严明的纪律。最初由会战于 大庆油田 的人所提出。 李季 《周总理啊，大庆儿女想念你》：“‘三老四严’高标准，总理最喜欢 毛主席 的好工人。” 刘白羽 《石油英雄之歌》：“在 华北 会战中严格地坚持了‘三老四严’精神和岗位责任制。”

1.the “three honests” and “four stricts” (“three honests”: be honest in thought, word and deed; “four stricts”: set strict standards for work, organization, attitude and observance of discipline); (revolutionary style of) being honest in thought, word and deed and setting oneself strict standards for work, organization, attitude and observance of discipline; be honest towards the revolutionary cause, honest in words and honest in deeds and set strict standards