Pref`er·en'tial adjective Giving, indicating, or having a preference or precedence; as, a preferential claim; preferential shares. Found on http://www.encyclo.co.uk/webster/P/149
of, pertaining to, or of the nature of preference: preferential policies. · showing or giving preference: a preferential hiring system. · receiving or enjoying preference, as a country in trade relations; favored. Found on https://www.infoplease.com/dictionary/preferential