a small valley between mountains; "he built himself a cabin in a hollow high up in the Appalachians"
a cavity or space in something; "hunger had caused the hollows in their cheeks"
as if echoing in a hollow space; "the hollow sound of footsteps in the empty ballroom"
not solid; having a space or gap or cavity; "a hollow wall"; "a hollow tree"; "hollow cheeks"; "his face became gaunter and more hollow with each year"
(computer science) a window for an active application
the part of a scene that is near the viewer
move into the foreground to make more visible or prominent; "The introduction highlighted the speaker's distinguished career in linguistics"; "highlight the passage so that you can find it again when you open the book"