In recent years scientific literacy is considered as one of the major aim of science education and it is the most popular phrase among science educators, teachers and various education reform documents. Though there exist numerous definitions of scientific literacy but there exists no consensus over any definition. For some it is merepossession of scientific knowledge, for some it is the scientific attitude and skills and application of the knowledge, while some see it as just the capacity for reading and comprehending scientific articles. Others consider it the different abilities of an individual for example making decisions in socio-scientific issues and/ or capacity to evaluate the quality of scientific information. Due to this ambiguity in definitions and meaningsmany authors consider it as an ill-defined phrase and suggest stopping the generic use of scientific literacy. Despite of this ambiguity, the importance of scientific literacy could not be lessened because now-a-days, with advancement of science and technologyevery country and government desire for scientific literate citizenry, but it again, raises the questionwhat is scientific literacy? The authors in this paper is tried to answer this question.