simultaneous
/ˌsɪm.əlˈteɪ̯.ni.əs/
Proposed by a contributor, not yet supported by evidence.
Sense 1
Meaning · English
Happening at the same moment.
Adjective
Examples
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 microenvironments, differing in humidity, light intensity, texture, etc.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
Meaning · English
To be solved for the same values of variables.
Adjective
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “simultaneous” mean?
Happening at the same moment.
Is “simultaneous” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.