occurring, existing, or done at the same time

एक साथ होने वाला

English Usage: The two events were simultaneous.

Hindi Usage: दोनों घटनाएँ एक साथ थीं।

an instance of two or more events occurring at the same time

एक साथ होने की घटना

English Usage: The simultaneous of the concert and the festival drew large crowds.

Hindi Usage: संगीत कार्यक्रम और महोत्सव का एक साथ होना बड़ी भीड़ खींचा।

at the same time

एक साथ

English Usage: They spoke simultaneously, creating a cacophony.

Hindi Usage: वे एक साथ बोले, जिससे एक शोरगुल पैदा हुआ।