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Adjective: vast (vaster,vastest)  văst
  1. Unusually great in size or amount or degree or especially extent or scope
    "at vast (or immense) expense"; "the vast reaches of outer space"; "the vast accumulation of knowledge...which we call civilization"
    - huge, immense, Brobdingnagian

Derived forms: vastest, vaster

See also: big, large, vastness

Encyclopedia: Vast