from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To state as an opinion.
  • intransitive v. To express an opinion: opined on the defendant's testimony.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of a class of organic compounds, derived from amino acids, found in some plant tumours
  • v. To have or express an opinion; to state as an opinion; to suppose, consider (that).
  • v. To give one's formal opinion (on or upon something).

from the GNU version of the Collaborative International Dictionary of English

  • v. To have an opinion; to judge; to think; to suppose.

from The Century Dictionary and Cyclopedia

  • To think; suppose.
  • To think; be of opinion that.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. expect, believe, or suppose
  • v. express one's opinion openly and without fear or hesitation


Middle English opinen, from Old French opiner, from Latin opīnārī, to suppose.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From the Latin opīnor ("to hold as an opinion"), from *opinus ("thinking, expecting"), only in negative nec-opinus ("not expecting") and in-opinus ("not expected"); akin to optare ("to choose, desire"), and to apisci ("to obtain"); see optate and opt. (Wiktionary)



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  • Oops! That was me--got carried away, I suppose.

    January 14, 2009

  • *eyeballs 'back-formation' tag.*
    Not a back-formation. Though the noun 'opinion' is much older in both English and French than the verb 'opine', the verb does come from a Classical Latin verb.

    January 14, 2009

  • "Must we accept the view of Empedocles of Trinacria that the right ovary (the postmenstrual period, assert others) is responsible for the birth of males or are the too long neglected spermatozoa or nemasperms the differentiating factors or is it, as most embryologists incline to opine ..."
    Joyce, Ulysses, 14

    January 22, 2007