The battle still raged in the distance, the colors duller against the morning sky.
An unwaxed cork tile will look duller in appearance.
L'Insecte, in the same key, but duller, followed.
Cannel is more compact and duller than ordinary coal, and can be wrought in the lathe and polished.
By instinct and temperament he was more impelled to the adventurous toils of exploration than to the duller task of building colonies.