How is "legato" best described in musical expression?

"Legato" is best described as a style of musical expression that performs notes in a smooth and connected manner. This technique emphasizes the seamless transition between each note, creating a flowing sound without any noticeable breaks or interrupts. The term itself is derived from Italian, meaning "tied together." In practice, it requires the musician to use a technique that ensures each note is blended with the next, contributing to a lyrical and cohesive phrasing in the music.

In contrast, the other descriptions do not align with the concept of legato. Music that is characterized as short and sharp lacks the connectedness that legato aims for, while a very fast and energetic tempo is more indicative of a lively style, and complete quietness means there is no sound at all, which is in stark opposition to the continuous play that legato embodies. Thus, the understanding of legato being long and connected is key to interpreting and performing music that seeks to convey smoothness and fluidity in its expression.