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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.

They identify an additional source of inflation risk to the U.S. economy from the conflict.

From The Wall Street Journal • Apr. 30, 2026

Late Thursday, Bonta announced that five additional states have joined his coalition that is suing to block the $6.2-billion merger.

From Los Angeles Times • Apr. 30, 2026

Notice the strong volume over the past two weeks, with a 9% gain last week and an additional 5% gain this week so far.

From Barron's • Apr. 30, 2026

That suggests there could still be significant room for additional buying from them, he said.

From MarketWatch • Apr. 30, 2026

The Advance sailed to Newfoundland, stopped to board a few additional sailors and more than fifty sled dogs, then continued up the western coast of Greenland.

From "American Spirits" by Barb Rosenstock