An illogical fear possessed him that Ryoval's guards would break in, and save their master even in death.

The dictionary definition of a phobia is 'an illogical fear', and the sufferer is often quite well aware that his fear is illogical.

Remember that a phobia is an illogical fear and not simply the natural caution with which we all treat potentially dangerous substances such as fire.

Take the example of the person with an illogical fear of fire.

There is nothing new about markets going to excess, with bouts of unreasoned enthusiasm followed by equally illogical fear.

Claustrophobia is the persistent illogical fear of small spaces or physical restraint.

Sudden, illogical fear rushed through him.

Appalled at her own illogical fear, she couldn't do anything to suppress it.

Then Burl had to conquer his illogical fear again before daring to touch the creature he had slain.

And for all of us, the short, sharp shock of illogical fear (the brakes temporarily fail on your car, or someone comes at you with a knife) is helpful.