having or prepared with information or knowledge; apprised: an informed audience that asked intelligent questions.

Origin of informed

late Middle English word dating back to 1400–50; see origin at inform1, -ed2
Related formsin·form·ed·ly [in-fawr-mid-lee] /ɪnˈfɔr mɪd li/, adverbhalf-in·formed, adjectivequa·si-in·formed, adjectiveun·in·formed, adjective



verb (used with object)

to give or impart knowledge of a fact or circumstance to: He informed them of his arrival.
to supply (oneself) with knowledge of a matter or subject: She informed herself of all the pertinent facts.
to give evident substance, character, or distinction to; pervade or permeate with manifest effect: A love of nature informed his writing.
to animate or inspire.
  1. to train or instruct.
  2. to make known; disclose.
  3. to give or impart form to.

verb (used without object)

to give information; supply knowledge or enlightenment: a magazine that entertains more than it informs.

Verb Phrases

inform on, to furnish incriminating evidence about (someone) to an authority, prosecuting officer, etc.: He informed on his accomplices.

Origin of inform

1275–1325; Middle English informen < Latin infōrmāre to form, shape, equivalent to in- in-2 + fōrmāre to form; replacing Middle English enfourmen < Middle French enfourmer < Latin, as above
Related formsin·form·a·ble, adjectivein·form·ing·ly, adverbhalf-in·form·ing, adjectivehalf-in·form·ing·ly, adverbun·in·form·ing, adjective

Synonyms for inform Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for informed

Contemporary Examples of informed

Historical Examples of informed

British Dictionary definitions for informed



having much knowledge or education; learned or cultured
based on informationan informed judgment




(tr; often foll by of or about) to give information to; tell
(tr; often foll by of or about) to make conversant (with)
(intr; often foll by against or on) to give information regarding criminals, as to the police, etc
to give form to
to impart some essential or formative characteristic to
(tr) to animate or inspire
(tr) obsolete
  1. to train or educate
  2. to report
Derived Formsinformable, adjectiveinformedly (ɪnˈfɔːmɪdlɪ), adverbinformingly, adverb

Word Origin for inform

C14: from Latin informāre to give form to, describe, from formāre to form




archaic without shape; unformed

Word Origin for inform

C16: from Latin informis from in- 1 + forma shape
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 informed



early 14c., "to train or instruct in some specific subject," from Old French informer "instruct, inform, teach," and directly from Latin informare "to shape, form," figuratively "train, instruct, educate," from in- "into" (see in- (2)) + formare "to form, shape," from forma "form" (see form (n.)). Varied with enform until c.1600. Sense of "report facts or news" first recorded late 14c. Related: Informed; informing.

Online Etymology Dictionary, © 2010 Douglas Harper