Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

Thesaurus

split-second

adjective

Synonyms and Antonyms of split-second

done or occurring without any noticeable lapse in time

  • a day trader who is used to making split-second decisions
Synonyms of split-second

immediate, instant, instantaneous, straightaway
Words Related to split-second

summary

fast, hit-and-run, prompt, quick, rapid, speedy, swift
Near Antonyms of split-second

dilatory, tardy

slow, sluggish

prolonged, protracted

deferred, delayed

split second

noun

Synonyms and Antonyms of split second

a very small space of time

  • a devastating accident can cause everything in your life to change in a split second
Synonyms of split second

beat, eyeblink, flash, heartbeat, instant, jiff, jiffy, minute, moment, nanosecond, New York minute, second, shake, trice, twinkle, twinkling, wink
Words Related to split second

microsecond

snatch, spurt
Near Antonyms of split second

aeon (or eon), age, eternity, forever

infinity, lifetime

Learn More about split-second

  1. See words that rhyme with split-second Dictionary: Definition of split-second

Seen and Heard

What made you want to look up split-second? Please tell us where you read or heard it (including the quote, if possible).

show comments hide comments

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games