The exposure of an impostor or a fraud

Usage examples of unmasking.

And since Selenay was going to be costumed identically with eleven of her ladies, at least until the moment of unmasking, this was probably one of the few times when she would be safer without a bodyguard.

She was supposed to be unmasking him, not throwing herself at him, for goodness sake!

I had nearly succeeded in unmasking him that he drew forth a short poniard, and stabbed me in the side.

I will keep a guard upon my words and tones, until, if my thought be verified, a moment fit for unmasking myself arrives.

Whenever Klima noticed those terrible antennae spying on him, unmasking him, stripping him naked, he was overcome by a hopeless sensation of fatigue.

That once decided, the unmasking will fall in as a natural consequence.

She was one of the crowd of fifty or so townspeople who would hear Enrico Basilica sing of his success as a master of disguise, it being a vital part of the entire process that, while the chorus would listen to expositions of the plot, and even sing along, they would suffer an instant lapse of memory afterwards so that later unmaskings would come as a surprise.