0 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.
1 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: --
Beyond these few big decisions, the government's craving for ever wider powers over land-use planning is megalomaniac.
propped up politicians who are venal, ineffective and more than a little megalomaniacal
Similar megalomaniac schemes were proposed in the 1960s, but were never carried through.
He was notorious for his megalomaniac fits - throwing things, screaming obscenities, and humiliating these teenage kids in his theater company.
The head teacher is a pill-popping megalomaniac, but also strangely inspiring.
It's also good for megalomaniacs who want to make the world all theirs.
The department is run by rabid militarist, right-wing megalomaniacs.
Some people actually called me a megalomaniac because of my ambitious ideas.