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simultaneous 
simultaneous definition
si·mul·ta·neous (sī′məl tā′nē əs, -tān′yəs; chiefly Brit & Cdn, sim′əl-)
adjective
occurring, done, existing, etc. together or at the same time
Etymology: ML simultaneus < simultas, simultaneity < L, competition, rivalry < simul: see same
Related Forms:
- simultaneity si′·mul·ta·ne′ity (-tə nē′ə tē, -nā′-) noun or simultaneousness si′·mul·ta′·neous·ness
- simultaneously si′·mul·ta′·neous·ly adverb
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