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bases

1 American  
[bey-seez] / ˈbeɪ siz /

noun

  1. plural of basis.

bases 2 American  
[bey-siz] / ˈbeɪ sɪz /

noun

  1. plural of base.

bases 1 British  
/ ˈbeɪsiːz /

noun

  1. the plural of basis

"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
bases 2 British  
/ ˈbeɪsɪz /

noun

  1. the plural of base 1

"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

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 Braves loaded the bases with two outs in the seventh, then scored two runs on a wild pitch and added a third on James Clark’s single.

From Los Angeles Times • Apr. 2, 2026

“They wouldn’t be invulnerable, but air bases are also very hard to shut down.”

From The Wall Street Journal • Apr. 1, 2026

The US has bases in each of the Gulf states.

From BBC • Apr. 1, 2026

Military operations are more complex than many people think, especially if they involve invading a hostile country and there aren’t many accessible bases in surrounding countries.

From Slate • Apr. 1, 2026

One lone chemist had suggested, insistently, that the bases of DNA must have something to do with each other.

From "The Gene" by Siddhartha Mukherjee

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.