vast
adjectiveUK /vɑːst/
US /væst/
Very, very big.
The ocean is vast and stretches as far as you can see.
OTHER MEANINGS
2. Very great in amount or degree.
She has a vast knowledge of dinosaurs.
3. Stretching over a very large area of land or space.
The vast desert seemed to go on forever.
4. Very important or serious in scale.
The new law made a vast difference to the town.