lactating lac·ta·ting US/ˈlækteɪtɪŋ/ uncommon adjective 1. producing or secreting milk “a wet nurse” “a wet cow” “lactating cows” Synonymswet Antonymsdry Similarfresh WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.