pass away—
1. cease to exist; disappear:
- When he laid his hands on me my headache and chest pains passed away.
2. (euph.) die:
- I’m sorry to hear that your dear uncle passed away last week.
pass off—
1. = pass away 1:
- These pains [in Caisson disease] pass off in a few hours.
2. succeed; turn out:
- The performance passed off without a hitch, the tent being crowded almost to its capacity.
pass out—
1. lose consciousness:
- Fancy that being a real burglar last night. I’d have passed out if I’d known.
2. successfully complete a course of training:
- How many of the students passed out this year?
3. = pass away 2:
- First, write the name of the dead relative or friend, then when they passed out.