simultaneous

si·mul·ta·neous

adj
\ˌsī-məl-ˈtā-nē-əs, -nyəs also ˌsi-\

Definition of SIMULTANEOUS

1

: existing or occurring at the same time : exactly coincident

2

: satisfied by the same values of the variables <simultaneous equations>

— si·mul·ta·ne·i·ty \-tə-ˈnē-ə-tē, -ˈnā-\ noun

— si·mul·ta·neous·ly \-ˈtā-nē-əs-lē, -nyəs-\ adverb

— si·mul·ta·neous·ness noun

Examples of SIMULTANEOUS

1. The two gunshots were simultaneous.
2. <a simultaneous release of the movie and its soundtrack on CD>

Origin of SIMULTANEOUS

Latin simul at the same time + English -taneous (as in instantaneous) — more at same

First Known Use: circa 1660

Related to SIMULTANEOUS

Synonyms: coetaneous, coeval, coexistent, coexisting, coextensive, coincident, coincidental, concurrent, contemporaneous, coterminous, contemporary, synchronic, synchronous

Antonyms: asynchronous, noncontemporary, nonsimultaneous, nonsynchronous

Related Words: accompanying, attendant, attending, concomitant, incident

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See Synonym Discussion at contemporary

Rhymes with SIMULTANEOUS

instantaneous, miscellaneous, subcutaneous