pacer

noun

pac·​er ˈpā-sər 

1

: one that paces

specifically : a horse whose predominant gait is the pace

2

: pacemaker

Synonyms

• leader
• pacemaker

Examples of pacer in a Sentence

a highly competitive industry in which any company that isn't a pacer quickly becomes a belly-up also-ran

Recent Examples on the Web

Ahead of the start of the three-match series starting in Tarouba, Windies pacer dislocated his left shoulder during a training session earlier this week. —Paras J. Haji, Forbes.com, 8 Aug. 2025

Andrew Boyd has been there for each of Frederick’s Badwater races, encouraging her from the support vehicle, running alongside her as a pacer. —Devin Kelly, Outside Online, 29 July 2025

Between fans screaming her name, the looming clock, and the global livestream, there was something palpably electric (and truly nerve-wracking) about watching Kipyegon take her place on the track alongside 13 world-class athletes, pacers who were positioned to help push Kipyegon forward. —L'oréal Blackett, Refinery29, 30 June 2025

The pacers included Grant Fisher, an American two-time Olympic bronze medalist. —Andrew Greif, NBC news, 26 June 2025

Word History

First Known Use

1616, in the meaning defined at sense 1

Rhymes for pacer

• acer
• baser
• chaser
• racer
• spacer
• tracer
• eraser
• replacer
• radiotracer

Medical Definition

pacer

noun

pac·​er ˈpā-sər 

: pacemaker sense 2

electronic cardiac pacers