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