Adjective
1. serving as an essential component;
"a cardinal rule""the central cause of the problem""an example that was fundamental to the argument""computers are fundamental to modern industrial structure"2. in or near a center or constituting a center; the inner area;
"a central position""central heating and air conditioning"3. used in the description of a place that in the middle of another place;
"the people of Central and Northern Europe""country in central Africa"4. centrally located and easy to reach;
"the central city has good bus service""the shop has a central location"