Sandro Nielsen (born 1961) is a Danish metalexicographer, Associate Professor at Centre for Lexicography at the Aarhus School of Business, Denmark, from where he received his PhD in 1992. Nielsen has contributed to lexicography as a theoretical and practical lexicographer with particular reference to bilingual specialised dictionaries (technical dictionaries). He is the author and co-author of more than one hundred publications on lexicography, theoretical papers, printed and electronic (online) dictionaries.
Sandro Nielsen is an authority on legal lexicography and bilingual law dictionaries and has proposed a fundamentally sound general theory of bilingual legal lexicography, which is described in his book The Bilingual LSP Dictionary – Principles and Practice for Legal Language published in 1994.
His research and publications identifies him as a modern lexicographer with the introduction of lexicographic concepts such as lexicographic information costs (Nielsen 2008), the distinction between a maximizing dictionary and a minimizing dictionary, the typology of multi-field, single-field and sub-field dictionaries, and the concept of function-related cross-references. He is one of the lexicographers that have combined lexicographic theory and translation strategies in an attempt to suggest improvements to bilingual translation dictionaries by showing how bilingual LSP dictionaries mix up source-language and target-language translation strategies (Nielsen 2000).
In his paper "Changes in dictionary subject matter" from 2003, Sandro Nielsen suggested a lexicographic approach to defining a dictionary in contrast to the traditional linguistic approach. He defines a dictionary in terms of its major features, and a dictionary has three such features: A dictionary is a lexicographic reference work that has been designed to fulfill one or more functions (its pure potential), contains lexicographic data supporting the function(s), and contains lexicographic structures that combine and link the data in order to fulfill the function(s). This definition applies to printed, electronic and Internet dictionaries, and it applies to existing, planned and imaginary dictionaries alike.