Pohn·pei (p?n?p??) also Po·na·pe (p??n?-p??) An island of the Federated States of Micronesia in the eastern Caroline Islands of the western Pacific Ocean. The capital Palikir is located here. It also constitutes a state with two dozen smaller atolls.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Pohn?pei (?po?n pe?) n. an island in the W Pacific, in the Caroline group: part of the Federated States of Micronesia. 129 sq. mi. (334 sq. km). Formerly, Ponape. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.