David Monaco’s term “The Spectrum of the Arts” refers to a framework for understanding the different forms and expressions of artistic activity, ranging from traditional visual arts (such as painting and sculpture) to more contemporary, interdisciplinary, and digital forms (like multimedia installations, performance art, or interactive media). By using the term “spectrum,” Monaco likely emphasizes the wide range of creative expression and the continuous, interconnected nature of these various art forms, rather than seeing them as distinct, isolated categories. 

In this sense, art is viewed as a broad continuum, where boundaries between disciplines are fluid, and artists are free to blend different mediums and methods. This perspective encourages an appreciation of art that values diversity, innovation, and the evolving nature of creative practice. 

It’s a concept often linked to modern and postmodern views on art, which resist strict definitions and classifications, emphasizing that art can manifest in many different forms and settings.