English Reference
adjective · noun

vast

adj. · n.
US /ˈvæst/ UK /vˈɑːst/ vast UK spelling vasts

  1. 01 B2 Upper Intermediate

    adj.very large or wide, covering a huge amount of space.

    adj.of very great extent or area; immense in physical space.

    Simple

    The desert was a vast ocean of sand that seemed to go on forever.

    In context

    The explorers were overwhelmed by the vast expanse of the Siberian tundra, where the horizon remained unbroken for hundreds of miles.

  2. 02 B2 Upper Intermediate

    adj.very great in size, amount, or importance.

    adj.very great in number, quantity, amount, or degree.

    Simple

    The project will cost a vast amount of money to complete.

    In context

    The study revealed a vast difference in the quality of healthcare available to urban and rural populations.

  3. 03 C2 Proficiency Literary

    n.a huge, empty space that has no visible limits.

    n.an immense or boundless space or expanse. Often used with 'the'.

    Simple

    The stars shone brightly in the dark vast of the night sky.

    In context

    The poet gazed into the starry vast, contemplating the insignificance of human life against the scale of the universe.

Usage vast majority · incorporation vast · random vast

More than 10 million years ago, a vast lake covered much of the continent, home to giant turtles and crocodylians.

Phys.org· 17 Aug 2026

We needed a more reliable way to examine vast areas of remote forest.

ScienceDaily· 4 Aug 2026
This entry
Level B2 · Upper Intermediate
Frequency Common
Updated