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English definition of “simultaneous”

simultaneous

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