1. the quality or state of being coeval; existence or occurrence at the same time as something else.
Usage: formal; often used in academic or technical contexts

Examples

• The coevality of the two geological formations suggests they were deposited during the same period.
• Scholars debated the coevality of the ancient texts, trying to determine if they were written at the same time.
• The coevality of these cultural artifacts indicates they belonged to the same civilization.
• Establishing coevality between the archaeological sites required careful dating analysis.
• The coevality of the two species' evolution was demonstrated through comparative DNA studies.