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

Derived Forms

• ˌsimulˈtaneousness, noun
• ˌsimulˈtaneously, adverb

Other Words From

• si·mul·ta·ne·ous·ly adverb
• si·mul·ta·ne·i·ty [sahy-m, uh, l-t, uh, -, nee, -i-tee, -, ney, -, sim-, uh, l-], si·mul·ta·ne·ous·ness noun
• non·si·mul·ta·ne·ous adjective
• un·si·mul·ta·ne·ous adjective
• un·si·mul·ta·ne·ous·ness 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 French sources said authorities in the Netherlands were conducting simultaneous searches, and that co-operation between the two countries had been going on for "many months".

From BBC

Los Angeles is expecting a heightened security atmosphere Friday as the city plays host to several high-profile sporting events, with simultaneous football, basketball and baseball games, presenting something of a dry run for the upcoming World Cup and Olympic Games.

From Los Angeles Times

Each party floods into power in a state of simultaneous overconfidence in its policy mandate and panic that its hold on power will be short-lived.

From Los Angeles Times

In the Missouri case, contact tracing interviews with the infected person "detected that the household contact had been symptomatic with nausea, vomiting and diarrhea with a simultaneous onset of symptoms, implying a common exposure rather than human-to-human transmission," said Dr. Demetre Daskalakis the CDC’s Director of the National Center for Immunization and Respiratory Diseases at a media briefing.

From Salon

Iranian Foreign Minister Abbas Araghchi has visited regional capitals, calling for simultaneous ceasefires in both Lebanon and Gaza.

From BBC

Related Words

• concurrent