An eighth note, also known as a quaver, is a musical note value that's usually played for half a beat. This note can appear in various time signatures, but it's most commonly seen in 4/4 time signature along with the quarter note. In music theory, synonyms for the eighth note include half beat note, sixteenth rest, and crochets. The eighth note is essential to various music genres, from classical to pop, and is utilized frequently in complex rhythms. Understanding the different synonyms for the eighth note is crucial to developing a better understanding and mastering the art of playing music.