prepossess v possess beforehand v cause to be preoccupied The idea of his failure prepossesses him v make a positive impression (on someone) beforehand A prepossessing appearance v influence (somebody's) opinion in advance Usage(s) The race to planet Mars by big countries is to prepossess it before others join in with their respective claims. His aim is to explore the Antarctic coast south of Australia and prepossess it for his dominion. Synonym(s) prejudice