Definition of "ineffably"

ineffably

adverb
comparative more ineffably, superlative most ineffably
1. indescribably; to a very great degree or extent.
  Quotations
  "And," said Crabbe, "I know exactly how much brandy's in that cupboard. And whisky." The Chinese smiled ineffably.
  1959, Anthony Burgess, Beds in the East (The Malayan Trilogy), published 1972, page 501
2. unmentionably; unspeakably