intransitive verb
1.
a. : to lose consciousness
was pretty well plastered, but he rarely got to the stage where he passed out — Myron Brinig
three men passed out from heat exhaustion — F.J.Bell
b. : to go out of existence : die
if it was going to pass out, I thought it ought to die as it had lived — Edmund Wilson
2. Britain : graduate
passed out when he was nineteen with a degree in chemistry — Nevil Shute