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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.

Fishermen in the San Francisco region will be allowed to catch a maximum of 160 Chinook per vessel during several open periods in May and August, and 100 on additional dates in September.

From Los Angeles Times • Apr. 12, 2026

She then spent an additional $60,000 on surveying, engineering and adding dirt to protect against flooding.

From Salon • Apr. 12, 2026

They were also given additional financial help for those with young children.

From BBC • Apr. 11, 2026

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

Ella reached inside, feeling around for additional clasps.

From "The Marvellers" by Dhonielle Clayton