Share this entry
unobtainium Syllabification: un·ob·tain·i·um
Pronunciation: /ˌənəbˈtānēəm/
(also unobtanium)

Definition of unobtainium in English:


A highly desirable material that is hypothetical, scientifically impossible, extremely rare, costly, or fictional, or has some of these properties in combination: what type of cabling are we talking about, steel, composite, unobtainium?
More example sentences
  • Indeed, the claims made for this technology sometimes make it sound like the legendary aerospace material ‘unobtainium.’
  • Veteran space industry analyst John Pike, director of, likes to joke that the required substance should be dubbed ‘unobtainium.’
  • But the Japanese 8mm Nambu cartridge might as well have been made of unobtainium.
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove ads and access premium resources