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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.

Evan Chung was the lead producer, Madeline Ducharme was the assistant producer, and there was additional production from Cheyna Roth.

From Slate • Apr. 19, 2026

Many AI models are full of risks “hiding in plain sight,” Stewart said, and can cause similar damage when given features such as additional memory.

From MarketWatch • Apr. 18, 2026

Gupton pays $70 a month for her primary-care membership and an additional $25 a month for each of her two sons.

From The Wall Street Journal • Apr. 18, 2026

The council said there were already bollards around more than half of the green, adding that additional bollards had been placed "to prevent vehicles driving on and damaging the grassed area".

From BBC • Apr. 18, 2026

In the next few days he discovered additional sources of nourishment: groundnuts, mulberries, wild mustard, wild onions, new kinds of mushrooms, spearmint, peppermint, and milkweed.

From "Abel's Island" by William Steig