We found one dictionary that defines the word unsolved problem:

General (1 matching dictionary)

1. Unsolved problem: Wikipedia, the Free Encyclopedia

▸ Words similar to unsolved problem ▸ Usage examples for unsolved problem ▸ Idioms related to unsolved problem ▸ Wikipedia articles (New!) ▸ Words that often appear near unsolved problem ▸ Rhymes of unsolved problem ▸ Invented words related to unsolved problem