1. Two or more people who investigate something together as joint investigators or research partners.
Usage: Plural form; typically used in academic, scientific, or professional contexts.

Examples

• The coinvestigators published their findings on climate change in a peer-reviewed journal.
• She and her coinvestigators spent three years studying the effects of the new drug.
• The police department assigned two coinvestigators to work on the cold case.
• The coinvestigators from different universities pooled their resources to conduct the study.
• As coinvestigators, they shared responsibility for data collection and analysis.