Adjective

(en-adj)

Very large or wide (literally or figuratively).

The Sahara desert is vast .

There is a vast difference between them.

Very great in size, amount, degree, intensity, or especially extent.

* {{quote-magazine, year=2012, month=March-April

, author=Anna Lena Phillips , title=Sneaky Silk Moths , volume=100, issue=2, page=172 , magazine=(American Scientist) citation , passage=Last spring, the periodical cicadas emerged across eastern North America. Their vast numbers and short above-ground life spans inspired awe and irritation in humans—and made for good meals for birds and small mammals.}}

(obsolete) Waste; desert; desolate; lonely.

* William Shakespeare, the Life and Death of Richard the Third Act I, scene IV:

the empty, vast , and wandering air

Adjective

(en-adj)

Of a place, the most remote, farthest or outermost.

In the greatest or highest degree; intense.

* , chapter=13

, title= The Mirror and the Lamp , passage=And Vickers launched forth into a tirade very different from his platform utterances. He spoke with extreme contempt of the dense stupidity exhibited on all occasions by the working classes. He said that if you wanted to do anything for them, you must rule them, not pamper them.}}

Excessive, or far beyond the norm.

* {{quote-magazine, date=2013-03

, author=Frank Fish, George Lauder, volume=101, issue=2, page=114, magazine=(American Scientist) , title= Not Just Going with the Flow , passage=An extreme version of vorticity is a vortex . The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.}}

Drastic, or of great severity.

Of sports, difficult or dangerous; performed in a hazardous environment.

(archaic) Ultimate, final or last.

the extreme hour of life