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Synonyms

additional

American  
[uh-dish-uh-nl] / əˈdɪʃ ə nl /

adjective

  1. added; more; supplementary.

    additional information.


additional British  
/ əˈdɪʃənəl /

adjective

  1. added or supplementary

"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

Other Word Forms

  • additionally adverb
  • preadditional adjective

Etymology

Origin of additional

First recorded in 1630–40; addition + -al 1

Explanation

If your parents get you a cell phone and add it to their plan as an additional line, they are adding one more line to their bill, so additional means another or one more. Even though they added an additional line to their plan, your parents might ask you to pay for the additional charges. That means they will see how much more your phone usage adds to their plan, and will charge it back to you. If you complain, they might say to avoid additional conflict, you can just get your own plan and pay all of the bills!

Keep Reading on Vocabulary.com

Vocabulary lists containing additional

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The fiasco brought additional scrutiny to Ms. Gay, whose scant scholarly record invited credible accusations of plagiarism.

From The Wall Street Journal • Apr. 10, 2026

“Further attacks on Gulf energy infrastructure, or escalation that draws in additional regional actors, remain underpriced,” she told MarketWatch in an interview on Wednesday.

From MarketWatch • Apr. 10, 2026

“Today’s plea is a step toward justice, but it cannot undo the additional trauma inflicted on families who were already dealing with loss.”

From Los Angeles Times • Apr. 10, 2026

Japan’s Prime Minister Sanae Takaichi said the country will release an additional 20 days’ worth of oil reserves early next month.

From Barron's • Apr. 10, 2026

With so many summer travelers expected, the Long Island Rail Road had just announced that it was providing additional service for the three-hour train trip from Penn Station in Manhattan to Amagansett.

From Nazi Saboteurs by Samantha Seiple