[in-di-tur-muh-nuh-buh l]


not determinable; incapable of being ascertained.
incapable of being decided or settled.

Origin of indeterminable

From the Late Latin word indēterminābilis, dating back to 1480–90. See in-3, determinable
Related formsin·de·ter·mi·na·ble·ness, nounin·de·ter·mi·na·bly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for indeterminable

Historical Examples of indeterminable

  • The factors of safety are indeterminable; the duplications of their internal mechanisms are conjectural, variable.

    Breaking Point

    James E. Gunn

  • The Unspeakable Perk turned and regarded him fixedly; but, owing to the goggles, the expression was indeterminable.

    The Unspeakable Perk

    Samuel Hopkins Adams

  • A contingency is simply an indeterminable future event, which may or may not be attended with danger or risk.

    English Synonyms and Antonyms

    James Champlin Fernald

  • Langley seemed prepared for anything, even for an indeterminable number of universes interfused--physics stark mad in metaphysics.

  • In other words, with an indeterminable future it has had a determinable past.

British Dictionary definitions for indeterminable



incapable of being ascertained
incapable of being settled
Derived Formsindeterminableness, nounindeterminably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for indeterminable

late 15c., from Late Latin indeterminabilis "that cannot be defined," from in- "not" (see in- (1)) + determinabilis, from determinare (see determine).

Online Etymology Dictionary, © 2010 Douglas Harper