C1adverb2K

Simultaneously

UK /["/ˌsɪmlˈteɪniəsli/"]/US /["/ˌsaɪmlˈteɪniəsli/"]/

Definition

at the same time as something else

In simple words: At the same time as something else.

Examples

  • The game will be broadcast simultaneously on TV and radio.
  • The slowdown of the US economy occurred simultaneously with a downturn in Europe.

Usage notes

Use 'simultaneously' to describe two or more actions happening at the same time. It works well in both spoken and written contexts but may sound overly formal in casual conversation.

Grammar pattern

standalone adverb

Memory hint

Think of 'simul' in 'simulate' — both actions happen in sync, like twins dancing together.

Collocations

  • happen simultaneously
  • simultaneously occur
  • perform simultaneously

Synonyms

  • at the same time
  • concurrently
  • together

Antonyms

  • sequentially
  • consecutively
  • successively

Common mistakes

  • Using it incorrectly to mean 'separately'.
  • Confusing it with 'simultaneous' which is an adjective.
  • Misplacing it in a sentence which can alter the meaning.