definition of
[central]

[1] #1 central s. [cardinal, fundamental, key, primal] 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". wn

[2] #2 central a. in or near a center or constituting a center; the inner area; "a central position". wn

[3] #3 central n. [telephone exchange, exchange] a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication. wn