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

• simultaneously adverb
• simultaneity noun
• simultaneousness 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

In 2019, almost a year after the Woolsey fire, a similar report prepared by Citygate Associates detailed how multiple simultaneous fires strained first responders’ ability to prioritize where to send people.

From Los Angeles Times

The plan calls for the simultaneous release of the 48 remaining hostages held by Hamas with an end to Israeli military operations across Gaza.

From BBC

He produces an appealing tension in the simultaneous presentation of archaic cultural norms alongside issues that feel as urgent as ever.

From Los Angeles Times

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

Related Words

• concurrent