If a flame blows out or you blow it out, it stops burning when a person or the wind blows on it.

After dinner she blew out the candles. 晚饭后她吹灭了蜡烛。

The sudden breeze made the candles blow out. 突然的一阵微风吹灭了蜡烛。

to disappoint someone by not meeting them or not doing something that you had arranged to do together

She was supposed to go to that party with me, but she blew me out. 她本该与我一起去那个聚会的，可是她失约了。