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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 perceived loss of independence and control that accompanies moving into an assisted-living facility adds an additional layer of concern.

From MarketWatch • Apr. 15, 2026

It added that additional security measures were deployed at the beginning of the month after the incident was detected.

From BBC • Apr. 15, 2026

But if you’ve bought your 12 general tickets and not the additional 12 soccer tickets, you won’t be entered into the next draw.

From Los Angeles Times • Apr. 15, 2026

Dimon says the company is currently testing Anthropic’s Mythos model, looking at whether it creates additional vulnerabilities.

From The Wall Street Journal • Apr. 15, 2026

The Kane family reluctantly provided Cornelius with additional funds for Maggie’s support.

From "American Spirits" by Barb Rosenstock