adjective. ['ˌɪntɝˈæktɪv, ˌɪnɝˈæktɪv'] capable of acting on or influencing each other.
adjective. ['ˌɪntɝˈæktɪv, ˌɪnɝˈæktɪv'] used especially of drugs or muscles that work together so the total effect is greater than the sum of the two (or more).