I knew that to be one of his defenses, that dull look.
Ra-Pan nodded, the dull look once more in his eyes.
Their simple and dull look is a protection mechanism from other animals, known as camouflage.
The dull, wooden look came down again over his face.
Harry gives me a dull look, then finally stops to turn and get a fix.
He tried to shroud his shock behind a blank, dull look.
Inside, the formal rooms had the same sort of dull, dark look as those in the Minister's offices.
"A deficiency can result in a dry scalp and thus hair, giving it a dull look."
His face has a sort of dull look in repose.