Viśvanātha Kavirāja is a familiar name in the field of Indian literature. He is a poet as well as critic. He has composed a good number of books of different languages. It is evident from the references made by him in the form of quotations to illustrate different types of technical divisions of Sanskrit literature. His magnum opus Sāhityadarpaṇa is the source of these informations. This is also a fact that the familiarity with the name of Viśvanātha Kavirāja is due to his Sāhityadarpaṇa, a handy manual of Sanskrit poetics. Its greatest merit is that it presents a full and complete treatment of the science of rhetoric in all its branches, in the campus of a single work. Another merit of the work is that it is written in a simple and flowing style. The relation between a word and its concept is an epistemological issue that attracts the attention of the scholars throughout the ages. Scholars from different areas took up the matter for discussion and found out some solutions. They unanimously admitted that there is some relation between a word and its corresponding meaning. When a speaker utters a word or a sentence, he intends to convey something through his words or sentences. Thus words have some conventional meanings and it is signified by some significative power, which lies in the word itself. This significative power is the relationship between word and its concept. The said relationship is recognized by some as inherent and by some as conventional. Viśvanātha Kavirāja defines a word as: