den 
/ˈdɛn/ noun
plural dens /ˈdɛn/ noun [count] 1 : the home of some kinds of wild animals
▪ a fox's den [=lair] ▪ The bears will spend most of the winter in their den. — see also lion's den 2 a US : an informal and comfortable room in a house
▪ The TV is in the den.
b chiefly Brit, informal + old-fashioned : a small and quiet room in a house where someone goes to read, work, etc.
▪ He spent most evenings in the den reading and smoking his pipe. 3 : a secret place where people meet especially to do things that are illegal or immoral
▪ a den of thieves ▪ a gambling den ▪ an opium den ▪ the club's reputation as a den of iniquity [=a place where immoral or illegal things are done] 4 Brit : a small often secret structure that children play in
▪ The children had built themselves a den in the woods. 5 US : a group of Cub Scouts — see also den mother
▪ a fox's den [=lair] ▪ The bears will spend most of the winter in their den. — see also lion's den
▪ The TV is in the den.
b chiefly Brit, informal + old-fashioned : a small and quiet room in a house where someone goes to read, work, etc.
▪ He spent most evenings in the den reading and smoking his pipe.
▪ a den of thieves ▪ a gambling den ▪ an opium den ▪ the club's reputation as a den of iniquity [=a place where immoral or illegal things are done]
▪ The children had built themselves a den in the woods.
