used conventionally in singing, esp. as a short refrain, to express gaiety or lightheartedness
: often ˌtra-ˈla-la
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.