1. having a significant effect or outcome
a dramatic change/rise/improvement
Dramatic is an adjective used to describe a person or situation which is sudden, striking or over the top with emotion. Drama is linked to the theatre so a similar meaning expression is 'theatrical', although dramatic has a more negative connotation. "Maria gets so upset about little details, she can be so dramatic." "John walked through the door just as the music started playing, it was so dramatic"