From King Dictionary of Contemporary Englishcentercen‧ter /ˈsentə $ -ər/ noun x-refthe American spelling of centre
Examples from the Corpus
centerHis goal is to turn Stanford into a center for environmental policy.a major banking centera new $3 million center for the elderlya flower with yellow petals and a purple centerthe Fred Hutchinson Cancer Research Centera huge shopping center
From King Business Dictionarycentercenter the American spelling of centre