High Quality Content by WIKIPEDIA articles! Definitions of art glass can be as complex and contentious as definitions of what constitutes "art" and will inevitably include many refinements and exceptions. On the one hand "art glass" is not quite of the size, uniqueness and scope to be considered as "art" - unlike glass art - but on the other, was designed or has come to be appreciated more for its decorative excellence, artistic merit or design distinctiveness than for any possible or originally intended use.