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.

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.

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

From Longman Dictionary of Contemporary English sim‧ul‧ta‧ne‧ous /ˌsɪməlˈteɪniəs $ ˌsaɪ-/ adjective things that are simultaneous happen at exactly the same time They grabbed each other’s hands in …

1. Happening, existing, or done at the same time. See Synonyms at contemporary. 2. Mathematics Containing variables for which there are values that can satisfy all the equations: simultaneous …

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