2:24 PM PT -- Dejounte Murray's postgame run-in with a referee will cost him big time ... the NBA just announced it's suspended the Hawks star one game without pay over the bump.
The league said in a statement Monday afternoon it found Murray not only made "inappropriate contact" with an official ... but he also verbally abused the ref as well.
Murray will now not be able to suit up for Game 5 of the Atlanta vs. Boston series on Tuesday ... a big deal, since the Celtics currently lead, 3-1.