What does pump up mean?
pump up
Definition
To fill a tire or a ball with air.
Example sentences
That back tire looks low on air — can you pump it up before we leave?
That back tire looks low on air — can you pump it up before we leave?
I pumped up the kids' football last night and it's already gone soft again.
I pumped up the kids' football last night and it's already gone soft again.
No matter how often I pump it up, the wheelbarrow tire is low on air again by the weekend.
No matter how often I pump it up, the wheelbarrow tire is low on air again by the weekend.