thick ‧ ly /ˈθɪkli/ BrE AmE adverb
[ Word Family: noun : ↑ thick , ↑ thickness , ↑ thickener , thickening, ↑ thicko ; verb : ↑ thicken ; adverb : ↑ thickly ; adjective : ↑ thick ]
1 . in a way that makes a thick piece or layer of something OPP thinly :
The cheese was sliced thickly.
a thickly carpeted hallway
2 . thickly populated/wooded etc if an area is thickly populated, wooded etc, there are a lot of people, trees etc there close together SYN densely :
The eastern part of the country is more thickly populated.