Being three is a term that refers to the concept of having three parts or aspects. It is often used in religious contexts, such as the Christian TRINITY, which is composed of God the Father, God the Son, and God the Holy Spirit. The term is also used in other contexts, such as the three branches of government in the United States. In the crossword puzzle, the solution for the term 'being three' is 'TRINITY, ' which is a reference to the Christian TRINITY.