The meaning of SIMULTANEOUS is existing or occurring at the same time : exactly coincident. How to use simultaneous in a sentence. Synonym Discussion of Simultaneous.

Definition of simultaneous adjective from the Oxford Advanced Learner's Dictionary. happening or done at the same time as something else. There were several simultaneous attacks by the rebels. They …

SIMULTANEOUS meaning: 1. happening or being done at exactly the same time: 2. happening or being done at exactly the…. Learn more.

Simultaneous definition: existing, occurring, or operating at the same time; concurrent: simultaneous translation.. See examples of SIMULTANEOUS used in a sentence.

1 day ago · 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 …

Define simultaneous. simultaneous synonyms, simultaneous pronunciation, simultaneous translation, English dictionary definition of simultaneous. adj. 1. Happening, existing, or done at the same time.

The adjective simultaneous describes something that is done at the same time as something else. "The teachers all assigned simultaneous projects to the students that week. The kids were grumbling and …

WordReference Random House Unabridged Dictionary of American English © 2025 si•mul•ta•ne•ous (sī′məl tā′ nē əs, sim′əl-), adj. existing, occurring, or operating at the same time; concurrent: …

Things which are simultaneous happen or exist at the same time. ...the simultaneous release of the book and the film.

simultaneous, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary