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Adjective: momentous  mow'men-tus or mu'men-tus
  1. Of very great significance
    "a momentous event"; "deciding to drop the atom bomb was a very momentous decision"

See also: important, significant

Encyclopedia: Momentous

Nearest

moment magnitude scale
moment of a couple
moment of a magnet
moment of inertia
moment of truth
momentaneous
momentarily
momentariness
momentary
momently
momentous
momentously
momentousness
momentum
momism
momma
Mommsen
mommy
Momordica
Momordica balsamina
Momordica charantia