Definition & Meaning of "wall-to-wall"in English

What does the idiom "wall-to-wall" mean?

The phrase "wall-to-wall" means something that completely fills a space or occurs continuously without gaps. The structure is literal, describing coverage from one wall to the other, used metaphorically for extent or saturation. It is informal usage often applied to crowds, sound, activity, or media coverage, such as "wall-to-wall people" or "wall-to-wall coverage," indicating total or overwhelming presence.