sedge wren sed·gew·ren uncommon noun 1. small American wren inhabiting wet sedgy meadows Synonymssedge wrenshort-billed marsh wrenCistothorus platensis 2. small European warbler that breeds among reeds and wedges and winters in Africa Synonymssedge warblersedge birdsedge wrenreedbirdAcrocephalus schoenobaenus Related words Broader terms Old World warblermarsh wren WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.