Definition of simultaneous
1
: existing or occurring at the same time : exactly coincident
2
: satisfied by the same values of the variables
simultaneous equations
Test Your Vocabulary
The Great British Vocabulary Quiz
-
- Named after Sir Robert Peel, what are British police called?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share simultaneous
Time Traveler for simultaneous
The first known use of simultaneous was circa 1660
See more words from the same year