rich person rich·per·son uncommon noun 1. a person who possesses great material wealth Synonymsrich personwealthy personhave Related words Word family have Broader terms person Narrower terms affluentCroesusfat catman of meansmillionairessplutocratmillionairebillionaire WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.