To burn the surface of, to scorch.
The sun today could parch cement.
To roast, as dry grain.
To dry to extremity; to shrivel with heat.
The patient's mouth is parched from fever.
To make thirsty.
We're parched, hon. Could you send up an ale from the cooler?
To boil something slowly (Still used in Lancashire in parched peas, a type of mushy peas).
To become superficially burnt; be become sunburned.
The locals watched, amused, as the tourists parched in the sun, having neglected to apply sunscreen or bring water.
The process of parching or roasting something, such as corn.
The condition of being parched; absolute dryness.
Capable of causing something to parch.
(of thirst) Extreme.