megalomaniac

2 definitions • 3 examples

someone who has an unnaturally strong wish for power and control, or thinks that they are much more important and powerful than they really are:

He has been accused of being a megalomaniac.

having an unnaturally strong wish for power and control, or showing that you think you are much more important and powerful than you really are:

megalomaniac dictators

His latest megalomaniac ambition is to build the world's highest apartment block.