wading bird wa·ding·bird uncommon noun 1. any of many long-legged birds that wade in water in search of food Synonymswading birdwader Related words Word family wade Broader terms aquatic bird Narrower terms storkshoebillibisspoonbillflamingoheroncranecourlan WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.