simultaneous

Meanings

1. 1
   adj

   occurring or operating at the same time

   The simultaneous accidents caught us by surprise – we were prepared for one, but not two.

2. 2
   adj

   Happening at the same moment.

   As with the Lejeuneaceae, this pattern of massive speciation appears to be correlated with the Cretaceous explosion of the angiosperms and the simultaneous creation of a host of new microenvironments, differing in humidity, light intensity, texture, etc.

3. 3
   adj

   To be solved for the same values of variables.

Etymology

From Medieval Latin simultaneus, from simultim (“at the same time, extended”), from Latin simul (“together, at the same time”); compare similar.