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

SIMULTANEOUS definition: 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.

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.

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: …