1. mountain pass the location in a range of mountains of a geological formation that is lower than the surrounding peaks
  2. mountain paca rodent of mountains of western South America
  3. mountainous containing many mountains
  4. mountain peak the summit of a mountain
  5. mountain daisy boreal or alpine sandwort
  6. mountain rose European alpine rose with crimson flowers
  7. mountain pine tall pine of western North America with stout blue-green needles; bark is grey-brown with rectangular plates when mature
  8. mountain box evergreen mat-forming shrub of North America and northern Eurasia having small white flowers and red berries; leaves turn red in autumn
  9. mountain bike a bicycle with a sturdy frame and fat tires
  10. mountain rice valuable forage grass of dry upland areas and plains of western North America to northern Mexico
  11. maintenance activity involved in keeping something in good working order
  12. countenance the appearance conveyed by a person's face
  13. mountain ebony small East Indian tree having orchid-like flowers and hard dark wood
  14. mountain ash any of various trees of the genus Sorbus
  15. mundaneness the quality of being commonplace and ordinary
  16. montan wax a hard wax obtained from lignite
  17. mountain man a man who lives on the frontier
  18. mountain avens creeping evergreen shrub with large white flowers
  19. mountain maple small shrubby maple of eastern North America
  20. mountain pride mat-forming plant with deep pink flowers on short erect leafy stems; rocky places at high elevations from Oregon to California