Noun
(retail) An unenclosed shopping center with a gross leasable area between 250,000 and 750,000 square feet.
(geometry) A radical center.
Used other than figuratively or idiomatically: see power, center.
Source: en.wiktionary.orgIt is always from the depths of its impotence that each power center draws its power, hence their extreme maliciousness, and vanity. Gilles Deleuze
I don't know how you can do it, if you don't recognition the media as a power center in America. Sydney Schanberg