From Longman Dictionary of Contemporary Englishsedgesedge /sedʒ/ noun [uncountable] HBPa plant similar to grass that grows in wet ground and on the edge of rivers and lakes
Examples from the Corpus
sedge• Sedge can easily be told from reed, rush or grass, as sedge has a sharp triangular-sectioned stem.• A sedge was ablaze with yellow spikes.• Wintery conditions disappeared and summer-like spells brought hatches of black gnat and sedge particularly towards the dam end of the reservoir.• Reed and sedge warblers were the dominant songsters.• Just one wide awake sedge warbler sang solo as stars began to twinkle in the darkening night sky.• Pure sedge was harvested for ridge thatching as it was more flexible than reed.• Tufts of sand sedge, precisely spaced, pushed through the sandy soil from nodules on long underground roots.Origin sedge Old English secg 