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

/ ˌsaɪməlˈteɪnɪəs; ˌsaɪməltəˈniːɪtɪ; ˌsɪməlˈteɪnɪəs; ˌsɪməltəˈniːɪtɪ /

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 video shows Gilmore driving away amid the shouting of several officers and a near simultaneous volley of gunshots.

From Washington Post

Tye’s lab has identified a neural pathway that helps guide behavior when simultaneous cues signal positive and negative outcomes.

From MIT Technology Review

When they have simultaneous asthma attacks, she has to choose who gets the panda.

From ProPublica

It’s also given her the time to pursue a simultaneous bachelors degree online.

From Time

Still, the simultaneous exit of this many brand partners is unprecedented for any major esports league.

From Digiday

In fact, the airplane and the movie were more or less simultaneous in conception (the movie opened in 1968).

From The Daily Beast

The portal will have a system of simultaneous translation in three languages including English.

From The Daily Beast

In response we have opened simultaneous reviews at several other VHA facilities.

From The Daily Beast

This week, investors were, um, charged up, by two simultaneous  bold strokes.

From The Daily Beast

As of this month, the website can handle 50,000 simultaneous users, for a total limit of 800,000 users per day.

From The Daily Beast

This compression will be vastly increased through the simultaneous opening of the eight circular speaking ports SP.

From Project Gutenberg

In starting out upon this simultaneous wooing, you forget that Mr. Devenish has already had his turn this morning alone.

From Project Gutenberg

Mr. Lake developed an instrument suited to this purpose and one which gave a simultaneous view of the entire horizon.

From Project Gutenberg

Old Faithful had worked half-way through the algebra and was busy solving simultaneous equations whilst sitting on the War Loan.

From Project Gutenberg

Immediately, by a simultaneous movement, the insurgents opened a path to the son of the victim.

From Project Gutenberg

Related Words

• concurrent