Maiden or hollow
As a variant of Cora, it stems from the Greek 'kore' meaning maiden. It is also occasionally used as a phonetic spelling of the Irish surname Corey, which refers to a hollow or a pool.
Less common today
Koree isn't in the latest US Top 1000. It last peaked at #4,227 in 1995.
US births per 5-year period, 1990βpresent (SSA data).