What does it mean if a singer is classically trained?

A classically trained singer has undergone formal education in vocal techniques and performance, often focusing on traditional styles and methods of singing rooted in Western Classical Music. This training typically includes lessons in breath control, vocal health, diction, and interpretation of classical repertoire. Such singers often possess a strong understanding of Music Theory and may also have experience with various singing styles, enabling them to perform a wide range of music with skill and artistry.