Confederate/kənˈfedərət/ Definition 1 of 3Pro Tip 1/3Neutral Term Used without negative or positive connotations to describe cooperation. The researchers became confederates in the study of marine biology. Pro Tip 2/3Not Secretive Confederate doesn't imply secrecy, unlike 'conspirator' or 'accomplice'. He openly introduced his business confederate at the conference. Pro Tip 3/3Formal Context Often used in formal contexts or official communications. The two companies acted as confederates in the merger deal.