run out of — use all of something up
phrasal verbB1core
to have none of something left because you have used it all
Pattern: run out of + noun
In use
- We've run out of milk, can you grab some?general
- I'm running out of time, I need to send this now.general
Common mistake
Keep 'of' when there's an object — 'run out of milk', not 'run out milk'.