It doesn't depend on the country. There are clear ideological definitions.
I know it's wiki but this might help:
Generally, the left wing is characterized by an emphasis on "ideas such as freedom, equality, fraternity, rights, progress, reform and internationalism" while the right wing is characterized by an emphasis on "notions such as authority, hierarchy, order, duty, tradition, reaction and nationalism".
Political scientists and other analysts usually regard the left as including anarchists, communists, socialists, democratic socialists, social democrats, left-libertarians, progressives, and social liberals. Movements for racial equality,as well as trade unionism, have also been associated with the left.
Political scientists and other analysts usually regard the right as including conservatives (among whom there are many strains, including traditionalist conservatism, libertarian conservatism, neoconservatism, and ultraconservatism right-libertarians, anarcho-capitalists, monarchists, fascists, and reactionaries.