- Inflamed or scorched; fiery. - Looking as if or scorched; sunburnt. - Having much heat in the constitution and little serum in the
blood. [Obs.] Hence: Atrabilious; sallow; gloomy.
Meaning of 'adust' (Princeton's WordNet)
1 . adust
[ s]
Meaning (1): - dried out by heat or excessive exposure to sunlight