millisecond

noun

mil·​li·​sec·​ond ˈmi-lə-ˌse-kənd 

-kənt

: one thousandth of a second

Did you know?

A millisecond isn't long enough for the blink of an eye, but a few milliseconds may determine the winner of a swim race or a hundred-yard dash. With the ever-increasing speed of modern technology, even a millisecond has started to seem a little sluggish; computer operations are now measured in nanoseconds—that is, billionths of a second.

Examples of millisecond in a Sentence

Recent Examples on the Web

Through careful tuning of an extended Kalman filter and by taking advantage of bamboo’s natural vibration-damping properties, the system slashes control latency from 15–20 milliseconds down to just 8–10 milliseconds, enhancing responsiveness while keeping flight stable. —Bojan Stojkovski, Interesting Engineering, 4 Apr. 2026

One useful outcome of this research and its findings is the fact that millisecond pulsars should be easier to detect than astronomers had previously theorized. —Robert Lea, Space.com, 3 Apr. 2026

Distracted driving includes texting, daydreaming and basically anything that takes your eyes off the road for more than a few milliseconds. —Brian Sherrod, CBS News, 2 Apr. 2026

All of that happens in milliseconds. —Kurt Knutsson, FOXNews.com, 28 Mar. 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

1909, in the meaning defined above

Rhymes for millisecond

• femtosecond
• microsecond
• nanosecond
• picosecond
• beckoned
• reckoned
• second
• seconde

Kids Definition

millisecond

noun

mil·​li·​sec·​ond ˈmil-ə-ˌsek-ənd 

also -ənt

: one thousandth of a second

Medical Definition

millisecond

noun

mil·​li·​sec·​ond ˈmil-ə-ˌsek-ənd, -ənt 

: one thousandth of a second

—abbreviation ms, msec