To howl, wail, or lament loudly.(verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "ululate" in a sentence
"And then she started to ululate, which is what they do."
"After landing deftly on his paws, he disappeared into the woods, his long ululate howl echoing behind him as he ran away from me."
"In some cultures, the grieving ululate, whip themselves, and rend their clothing."