simultaneously

The word “simultaneously” means at the same moment; occurring together in time. In plain terms, at the same time as something else.

“Simultaneously” is pronounced sihml-TAY-neers-lee (/ˌsaɪmlˈteɪnɪəsli/ in IPA).

Here is “simultaneously” used in a sentence: “The two athletes crossed the finish line simultaneously.”

The opposite of “simultaneously” — its antonyms — are individually, one at a time, piecemeal, separately and severally.

“Simultaneously” is an adverb.

“Simultaneously” is a fairly common word in modern English, usually learned at around the B1 level.

Both describe events happening at the same time, but "simultaneously" stresses the exact same moment, while "concurrently" often means overlapping periods that run alongside one another without necessarily starting at the identical instant. Two alarms sound simultaneously, but two projects can run concurrently over weeks.

"Simultaneously" is a single adverb suited to formal, technical, or scientific writing, whereas "at the same time" is a more conversational phrase. Both are correct, but "simultaneously" is more concise in reports and instructions.

"Simultaneously" means events happen together at the same moment, while "consecutively" means they happen one after another in sequence. The two words are opposites, so tasks done simultaneously overlap, but tasks done consecutively do not.

As an adverb, "simultaneously" can appear after the verb, at the end of a clause, or occasionally at the start for emphasis, as in "The lights flickered simultaneously." It modifies the timing of the action rather than any single noun.