Pertaining to or constituting the center: as, the central point of a circle; a central country of Europe.Nuclear in constitution or principle; constituting that from which other related things proceed, or upon which they depend: as, the central facts of history; a central idea.Passing through or near the center or middle; median: as, a central line; the New York Central Railroad.In an at., of or relating to the centrum of a vertebra.In neural., pertaining to a nerve-center: opposed to peripheral, or pertaining to the nerve-fibers or to the nervous terminations in sense-organs and muscles.n. In a telephone system, the office from which the public and private lines radiate and in which the connections are made between the different lines, by means of a central switch-board.n. Cane-grinding apparatus which serves for several sugar plantations.