adj.
Pronunciation: ˌ s ī -m ə l- ' t ā -n ē - ə s, -ny ə s also ˌ si-
Function: adjective
Etymology: Latin simul at the same time + English -taneous (as in instantaneous ) ― more at SAME
Date: circa 1660
1 : existing or occurring at the same time : exactly coincident
2 : satisfied by the same values of the variables < simultaneous equations>
synonyms see CONTEMPORARY
– si · mul · ta · ne · ity \ -t ə - ' n ē - ə -t ē , - ' n ā - \ noun
– si · mul · ta · neous · ly \ - ' t ā -n ē - ə s-l ē , -ny ə s- \ adverb
– si · mul · ta · neous · ness noun