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simultaneous

adjective
 
 
/ˌsɪm.əlˈteɪ.ni.əs/ US  /ˌsaɪ.məl-/

Definition

C1 happening or being done at exactly the same time: There were several simultaneous explosions in different cities.Simultaneous and consecutiveOrder and sequence simultaneously
 
 
/-li/ adverb
B2 Two children answered the teacher's question simultaneously.Simultaneous and consecutiveOrder and sequence
simultaneousness
 
 
/-nəs/ noun [U] (also simultaneity, /-təˈneɪ.ə.ti/ US  /-təˈniː.ə.t̬i/)
(Definition of simultaneous adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of simultaneous