What does 'Molto' signify in music notation?

The term 'Molto' in music notation signifies "much" or "very." It is often used as an indication to enhance the expression of tempo, dynamics, or other musical directions. For instance, when you see terms like "molto allegro" or "molto forte," you understand that the music should be played very fast or with much volume, respectively. This emphasis on intensity can significantly affect the character and emotion of the music, making it essential for performers to be aware of such terms to deliver the intended expression accurately.

The other terms in the question do not align with the meaning of 'molto.' 'Less, not much' would imply a reduction in intensity, while 'somewhat' suggests a vague or moderate degree, neither of which captures the essence of 'molto.' 'Gradually' refers to a process of change over time and does not relate to the concept of quantity or degree that 'molto' implies. Understanding these nuances is crucial when interpreting musical scores.