From Longman Dictionary of Contemporary Englishyowlyowl /jaʊl/ verb [intransitive] Cif an animal or a person yowls, they make a long loud cry, especially because they are unhappy or in pain SYN howl A tomcat was yowling out on the lawn. —yowl noun [countable]→ See Verb table
Examples from the Corpus
yowl• Kip kept yowling and cursing in the kitchen.• The noisy, speechless animal would yowl, waking Ted.Origin yowl (1100-1200) Probably from the sound 