The term 'One in a Million' is a phrase used to describe something that is extremely RARE or unique. This phrase can be broken down into three crossword solutions: Rarity (6 letters), RARE (4 letters), and Freak (5 letters). The word Rarity implies that something is not common, while RARE suggests that it is not often seen or encountered. Finally, Freak implies that something is extraordinary or unusual. All three words together suggest that the phrase 'One in a Million' is used to describe something that is exceptionally RARE and unique.