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"
the qualities of a hero or heroine; exceptional or heroic courage when facing danger (especially in battle); "he showed great heroism in battle"; "he received a medal for valor"
(of e.g. speech and writing) tending to depart from the main point or cover a wide range of subjects; "amusingly digressive with satirical thrusts at women's fashions among other things"; "a rambling discursive book"; "his excursive remarks"; "a rambling speech about this and that"
of superficial relevance if any; "a digressive allusion to the day of the week"; "a tangential remark"