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• set off
  set off

  verb

  (intr) to embark on a journey
• set-off
  set-off

  noun

  printing a fault in which ink is transferred from a heavily inked or undried printed sheet to the sheet next to it in a pile

set off

¹ British  

verb

1. (intr) to embark on a journey

2. (tr) to cause (a person) to act or do something, such as laugh or tell stories

3. (tr) to cause to explode

4. (tr) to act as a foil or contrast to, esp so as to improve

   that brooch sets your dress off well

5. (tr) accounting to cancel a credit on (one account) against a debit on another, both of which are in the name of the same person, enterprise, etc

6. (intr) to bring a claim by way of setoff

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noun

1. anything that serves as a counterbalance

2. anything that serves to contrast with or enhance something else; foil

3. another name for setback See set back

4. a counterbalancing debt or claim offered by a debtor against a creditor

5. a cross claim brought by a debtor that partly offsets the creditor's claim See also counterclaim

set-off ² British  

noun

1. Also called (esp Brit): offset.  printing a fault in which ink is transferred from a heavily inked or undried printed sheet to the sheet next to it in a pile

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set off Idioms  

1. Give rise to, cause to occur, as in The acid set off a chemical reaction . [Early 1600s]

2. Cause to explode, as in They set off a bomb . [Late 1800s]

3. Distinguish, show to be different, contrast with, as in That black coat sets him off from the others in the picture , or Italics set this sentence off from the rest of the text . [Late 1500s]

4. Enhance, make more attractive, as in That color sets off her blonde hair . [Early 1600s]

5. Begin a journey, leave, as in When do you set off for Europe? [Second half of 1700s]

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Example Sentences

See Examples For:

set off set-off

The incident set off alarms at OpenAI, which shut down systems it uses to test its AI models after it learned of the incident, to assess the damage and prevent further breakouts.

From The Wall Street Journal ● Jul. 24, 2026

Dense wildfire smoke billowing down from Canada set off unhealthy air quality alerts across the United States on Friday, triggering concern over the weekend's World Cup final outside New York.

From Barron's ● Jul. 17, 2026

That’s set off alarm bells on Wall Street.

From MarketWatch ● Jul. 15, 2026

That set off “a lot of phone calls, texts, and communication internally.”

From Los Angeles Times ● Jul. 11, 2026

As I set off toward the nature trail, it’s hard to gauge how fast to go.

From "Keeping Pace" by Laurie Morrison

In the first quarter of next year the one millionth all-electric car will set-off on UK roads, according to Schmidt Automotive Research.

From BBC ● Dec. 21, 2023

Purists will appreciate that every page of the comics was scanned and enlarged from originals, retaining original printing errors, poor registration and ink set-off that appear in early comics to give a feeling of authenticity.

From Washington Times ● Dec. 6, 2019

Historically, Guinea-Bissau has been popular set-off point for migrants hoping to make it to Europe.

From BBC ● Oct. 3, 2018

Oliver exclaimed to set-off a dedicated segment of his HBO show "Last Week Tonight" on Sunday.

From Salon ● Jun. 11, 2018

As a set-off, however, to this, the scenery proved to be magnificent,—the floating mountains of ice resembling enchanted castles, and all nature was on a stupendous scale.

From Fridtjof Nansen A book for the young by Bull, Jacob B.

Related Words

• add to
• aggravate
• boost
• build up
• deepen
• enhance
• escalate
• exacerbate
• heat up
• heighten
• increase
• quicken
• raise
• redouble
• reinforce
• sharpen
• step up
• strengthen