D defs.my
Entry 1 sense Webster, 1913

Butte

/byo͞ot/ · IPA /ˈbʌt/
01 n. A detached low mountain, or high rising abruptly from the general level of the surrounding plain; -- applied to peculiar elevations in the …
  1. 1.
    A detached low mountain, or high rising abruptly from the general level of the surrounding plain; -- applied to peculiar elevations in the Rocky Mountain region.
    “The creek . . . passes by two remarkable buttes of red conglomerate.” — Ruxton.