Meanings
How to pronounce "all at once":
AU
Unexpectedly; without warning; all of a sudden.
Used other than figuratively or idiomatically: All at the same time; all together.
Example: "There are too many to get in the lift all at once, so some must wait."
Example Sentences
1
I heard a noise and felt a sharp pain all at once.
2
When the clock struck midnight, everyone yelled 'Happy New Year!' all at once.
3
The children rushed to open their presents all at once.
4
The storm hit the coast, bringing heavy rain, strong winds, and lightning all at once.
5
I walked into the room and saw my friends wearing party hats, blowing balloons, and dancing all at once.
