assembling as·semb·ling US/ʌˈsɛmblɪŋ/ uncommon noun 1. the act of gathering something together Synonymscollectioncollectingaggregation Related words Word family collect Broader terms grouping Narrower terms agglomerationcollationcompilationgatherbottle collectionconchologynumismaticspickup WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.