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running mate

American  

noun

  1. a candidate for an office linked with another and more important office, as for the vice-presidency.

  2. a horse entered in a race in which another, more important, horse from the same stable, or belonging to the same owner, is run.

  3. a close companion.


running mate British  

noun

  1. a candidate for the subordinate of two linked positions, esp a candidate for the vice-presidency

  2. a horse that pairs another in a team

"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

Etymology

Origin of running mate

An Americanism dating back to 1865–70

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.

Pritzker elevated Stratton to be his running mate in 2017 when she was just seven months into her first term as a state representative.

From The Wall Street Journal • Mar. 18, 2026

Flavio's press advisor said he would seek a woman running mate, possibly from the poor northeast -- Lula's stronghold.

From Barron's • Mar. 11, 2026

He might serve as Vance’s running mate, I guess, but both in Munich and in general he strikes me more as a chirrupy Robin to JD’s would-be Dark Knight.

From Salon • Feb. 22, 2026

Without his frontcourt running mate, Ayton said he wanted to bring the same mindset he’s had all season to help the Lakers bounce back from Monday’s disappointing loss.

From Los Angeles Times • Jan. 14, 2026

All this left me more energized to help make the final push for Barack and Joe Biden, the affable senator from Delaware who’d soon be announced as his running mate.

From "Becoming" by Michelle Obama

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