Definition of unrumple in US English:

unrumple

verb

  • with object To free from creases, wrinkles, or rumples; to make smooth or tidy; to unfold, open out.

Origin

Late 17th century; earliest use found in Joseph Addison (1672–1719), writer and politician. From un- + rumple.

Pronunciation

unrumple

/(ˌ)ʌnˈrʌmpl/