inform

¹ American  

[in-fawrm] / ɪnˈfɔrm /

verb (used with object)

1. to give or impart knowledge of a fact or circumstance to.

   He informed them of his arrival.

   Synonyms:

   tell, advise, notify, apprise

2. to supply (oneself) with knowledge of a matter or subject.

   She informed herself of all the pertinent facts.

   Synonyms:

   acquaint

3. to give evident substance, character, or distinction to; pervade or permeate with manifest effect.

   A love of nature informed his writing.

4. to animate or inspire.

5. Obsolete.

   1. to train or instruct.

   2. to make known; disclose.

   3. to give or impart form to.

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verb (used without object)

1. to give information; supply knowledge or enlightenment.

   a magazine that entertains more than it informs.

verb phrase

1. inform on to furnish incriminating evidence about (someone) to an authority, prosecuting officer, etc..

   He informed on his accomplices.

inform ² American  

[in-fawrm] / ɪnˈfɔrm /

adjective

Obsolete.

1. without form; formless.

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inform ¹ British  

/ ɪnˈfɔːm, ɪnˈfɔːmɪdlɪ /

verb

1. (tr; often foll by of or about) to give information to; tell

2. (tr; often foll by of or about) to make conversant (with)

3. (intr; often foll by against or on) to give information regarding criminals, as to the police, etc

4. to give form to

5. to impart some essential or formative characteristic to

6. (tr) to animate or inspire

7. obsolete (tr)

   1. to train or educate

   2. to report

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inform ² British  

/ ɪnˈfɔːm /

adjective

1. archaic without shape; unformed

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Other Word Forms

• half-informing adjective
• half-informingly adverb
• informable adjective
• informedly adverb
• informingly adverb
• uninforming adjective

Etymology

Origin of inform¹

First recorded in 1350–1400; Middle English enfo(u)rmen, informen, from Old French enfo(u)rmer, from Latin infōrmāre “to form, shape,” equivalent to in- in- ² + fōrmāre “to form ”

Origin of inform²

First recorded in 1545–55; from Latin informis “formless, deformed,” equivalent to in- in- ³ + -formis -form

Explanation

To inform is to tell someone news, pass on wisdom, leak gossip, or give instruction. You've been informed that you won the raffle at the county fair. What are you going to do with all that cheese? The Latin verb infōrmāre means "to form or shape." The idea of passing on knowledge came about in the 14th Century, with the meaning of "teaching or instructing" coming later. Thomas Jefferson, who believed democracy to be impossible without informed citizens, said, “Educate and inform the whole mass of the people... They are the only sure reliance for the preservation of our liberty.”

Example Sentences

"Because these feelings are modifiable, our goal is for this research to inform culturally sensitive stress-reduction interventions to mitigate these feelings in older adults."

From Science Daily • Apr. 27, 2026

Because people don’t have enough time—my job is to be informed, and I don’t want to have to spend time trying to inform somebody, or I don’t want to argue with them.

From The Wall Street Journal • Apr. 27, 2026

Another new rule eliminates the requirement that brokers have to inform beneficiaries that they could get free and independent information from SHIPs.

From MarketWatch • Apr. 24, 2026

Reports of upcoming layoffs were leaked, prompting Meta to inform employees about the cuts this week.

From Los Angeles Times • Apr. 23, 2026

But to do that he must inform on himself, as well.

From "The Golden Goblet" by Eloise Jarvis McGraw

Related Words

• advise
• apprise
• brief
• caution
• educate
• instruct
• notify
• tell
• update
• warn