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.

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

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: …

Definition of simultaneous. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels.

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

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 …

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

Simultaneous refers to two or more events or actions occurring or existing at the same exact time period. It implies a concurrent, parallel, or side-by-side happening of things.