ˈdɛnsli θɘk ˈθɪkli in a concentrated manner old houses are often so densely packed that perhaps three or four have to be demolished for every new one built a thickly populated area in quick succession misfortunes come fast and thick spoken with poor articulation as if with a thick tongue after a few drinks he was beginning to speak thickly with thickness; in a thick manner spread 1/4 lb softened margarine or cooking fat fairly thickly all over the surface we were visiting a small, thickly walled and lovely town with straggling outskirt with a thick consistency the blood was flowing thick