What does the word subsidiary mean?

Usage examples for subsidiary

  1. These conventions bear date at Shanghai on the 8th November, 1858. Having been considered in the light of binding agreements subsidiary to the principal treaty, and to be carried into execution without delay, they do not provide for any formal ratification or exchange of ratifications by the contracting parties. – Complete State of the Union Addresses from 1790 to the Present by Various
  2. At a certain point in our front our advance trenches were on the north of the Aisne, not far from a village on a hillside and also within a short distance of German works, being on a slope of a spur formed by a subsidiary valley running north and a main valley of the river. – America's War for Humanity by Thomas Herbert Russell