Definition of ascension robe in English:

ascension robe

noun

US
  • (Usually in plural) a garment worn in readiness for one's ascension to heaven (in imitation of the appearance of Christ's garments at his transfiguration); specifically a muslin robe worn amongst the Millerites in the expectation of the advent of Christ.

Origin

Mid 19th century; earliest use found in Nauvoo (Illinois) Neighbor.