simultaneous

[sahy-muhl-tey-nee-uhs, sim-uhl-]

adjective

1. existing, occurring, or operating at the same time; concurrent: simultaneous translation.

   simultaneous movements;

   simultaneous translation.

   Synonyms: coincident, synchronous

simultaneous

/ ˌsaɪməltəˈniːɪtɪ, ˌsɪməltəˈniːɪtɪ, ˌsaɪməlˈteɪnɪəs, ˌsɪməlˈteɪnɪəs /

adjective

1. occurring, existing, or operating at the same time; concurrent

noun

1. Sometimes shortened to: simul. chess a display in which one player plays a number of opponents at once, walking from board to board

Other Word Forms

• simultaneousness noun
• simultaneously adverb
• simultaneity noun
• nonsimultaneous adjective
• unsimultaneous adjective
• unsimultaneousness noun

Word History and Origins

Origin of simultaneous¹

First recorded in 1650–60; from Latin simul “together” ( similar ) + (instan)taneous

Word History and Origins

Origin of simultaneous¹

C17: formed on the model of _{instantaneous} from Latin simul at the same time, together

Example Sentences

The massive immigration operation led to the arrests of more than 300 workers without documentation during simultaneous raids at Glass House Farms’ Camarillo and Carpinteria grow sites, according to the Department of Homeland Security.

From Los Angeles Times

The Kpop Demon Hunters soundtrack has also become the first to have four simultaneous Top 10 hits on the Billboard Hot 100.

From BBC

Reports suggested it was part of a co-ordinated plot involving three simultaneous IS attacks but he had changed his mind at the last minute.

From BBC

It’s converging at an “interesting time,” Carr-Glenn said, given the “simultaneous penalty that Black women face in this country on account of being both Black and women.”

From Salon

Such a quake would be the largest simultaneous disaster in modern California history, with huge swaths of the state wracked by powerful seismic shaking all at once.

From Los Angeles Times

Related Words

• concurrent