(n.) A factor that appears the same in different situations. Derived from mathematics where the numerator is divded by the lowest common denominator in fraction questions where it must be discovered which fraction is bigger by making the denominator the same.
Your face is the common denominator in three robberies at your place of work, which implies you have a connection to these robberies, although we could be wrong.
A Justin Bieber love-meets-mathematics song.
Strangely, no one gets the lyrics right on any site.
Person #1: "Just a fraction of your love fills the aiir...."
Person #2: "Hey, isn't that Common Denominator by Justin Bieber ?"
Person #1: "It is !"
Person #2: "I love that song, but I can't find the right lyrics on the net"
Person #1: "Neither can I, who understands a song about math anyway ?"