Umptillion Definition
    noun
  
 (slang, hyperbolic) An unspecified large number (of).
 Wiktionary 
Other Word Forms of Umptillion
Noun
Singular:
 umptillionPlural:
 umptillionsOrigin of Umptillion
-  umpty + -illion From Wiktionary 
Find Similar Words
Find similar words to umptillion using the buttons below.