black out phrasal verbphr v a) MIto become unconscious 昏厥，失去知觉 SYN faint, pass out For a few seconds, he thought he was going to black out. 有那么一会儿，他觉得自己快要晕过去了。
b) TCNMARK black something ↔ out to put a dark mark over something so that it cannot be seen 盖住某物；涂黑某物 The censors had blacked out several words. 审查员涂掉了几个单词。
c) PMLIGHT black something ↔ out to hide or turn off all the lights in a town or city, especially during war 〔尤指战时〕对〔城镇或城市〕实行灯火管制
→ blackout → black out at black3(1)