a murderer (especially one who kills a prominent political figure) who kills by a treacherous surprise attack and often is hired to do the deed; "his assassins were hunted down like animals"; "assassinators of kings and emperors"
Some people say `bravo' to express appreciation when someone has done something well. `Bravo, Rena! You're right,' the students said. = well done. used to show your approval when someone, especially a performer, has done something very well (from bravo (adjective); BRAVE)