We found one dictionary that defines the word boris's den:

General (1 matching dictionary)

1. Boris's den: Wiktionary

Definitions from Wiktionary (Boris's den) ▸ noun:  (bingo) ten ▸ Words similar to boris's den ▸ Usage examples for boris's den ▸ Idioms related to boris's den ▸ Wikipedia articles (New!) ▸ Words that often appear near boris's den ▸ Rhymes of boris's den ▸ Invented words related to boris's den