Large in scope.
Of great extent or amount
Covering a wide scope; general:
Remarkably large, extensive, etc.; great
The definition of little is small in size, quantity or importance.
Of small or limited width, especially in comparison with length.
Loud and firm; resounding:
Find another word for vastest. In this page you can discover 10 synonyms, antonyms, idiomatic expressions, and related words for vastest, like: hugest, widest, largest, greatest, broadest, amplest, mightiest, littlest, narrowest and biggest.