A time signature is a musical notation that indicates the number of beats per measure and the type of note that receives the beat. Other synonyms for "time signature" include meter signature, bar signature, and rhythmic notation. These terms are all used to describe the same concept of rhythm and provide a framework for musicians to read and interpret sheet music. In different musical genres and cultures, various time signatures are employed to create unique rhythms and musical expressions. Common time signatures include 4/4, 3/4, 6/8, and 2/2, but musicians may encounter more complex or unconventional time signatures as well.