secretive /ˈsiːkɹɪtɪv/adjective 1/səˈkɹiːtɪv/ adjective 1forms 2 adjective1 •Having an inclination to secrecy.She's a secretive girl, not giving away much about her life.Why are you acting all secretive? What are you hiding? secretive /səˈkɹiːtɪv/ adjective1 •Relating to secretion. formsmore secretive · most secretive