HAPPEN [T] › If an event marks the beginning, end, etc of something, it causes it, or happens at the same time as it: His death marks the end of an era in television. CELEBRATE [T] › If you mark an occasion, you do something to celebrate it: They've declared Tuesday a national holiday to mark the 10th anniversary of Independence. SHOW A PLACE [T] › to show where something is by drawing or putting something somewhere: I've marked my street on the map for you. GIVE RESULTS [I, T] › to check a piece of work or an exam, showing mistakes and giving a letter or number to say how good it is: to mark essays DIRTY [T] › to leave an area of dirt on something