IPA: /ˈskriːnfʊl/
KK: /ˈskrinˌfəl/
The total amount of content that can be displayed on a screen at one time.
I can only see one screenful of data at a time on my computer.
Screenful → It is formed from "screen" (from Old English *scrēan*, meaning to shield or protect) and "-ful" (meaning full of). The word "screenful" means full of screen or the amount that a screen can display.
Think of a screen that is 'full of' information or content — that's what screenful means.