loadingbar
nounUK /ˈləʊdɪŋ bɑː/
US /ˈloʊdɪŋ bɑːr/
A loading bar is a little strip on a screen that fills up to show you how much longer you have to wait.
I watched the loading bar slowly fill up while my game started.
OTHER MEANINGS
2. A bar-shaped graphic that shows how much of a task is finished.
The loading bar turned green when the file was almost done.
3. A visual sign that a program is busy working.
The loading bar kept spinning, so I knew the app was still thinking.
4. A strip that fills from left to right as data loads.
A tiny loading bar appeared at the bottom of the page.