Constant Arrays Possible?

Is it possible to define a constant that is an array of other predefined constants? If so, what would the syntax be? I'm trying something like the following (all items prefixed with an uppercase "G" are constants) without success: define("GaNavButtons", array( GnavSectionHome => array ( GsectionSelected => Gb_home, GsectionUnSelected => Gb_home_uns), GnavSectionLinks => array ( GsectionSelected => Gb_links, GsectionUnSelected => Gb_links_uns), GnavSectionAbout => array ( GsectionSelected => Gb_about, GsectionUnSelected => Gb_about_uns), GnavSectionContact => array ( GsectionSelected => Gb_contact, GsectionUnSelected => Gb_contact_uns), GnavSectionShopping => array ( GsectionSelected => Gb_shopping, GsectionUnSelected => Gb_shopping_uns));