Eight times as much in size, strength, number, or amount.(adjective)
An eightfold amount or number.(noun)
To multiply or be multiplied by eight.(verb-transitive)
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 "octuple" in a sentence
"His celebratory plans are limited to drinking: "He would start with an octuple whiskey.""
"If you're nervous about handling a whisk or don't know how many mushrooms are enough in my experience, think of a number and octuple it, you might be better off with evening classes."
"In my case, being a vegetarian and all, I'd require nothing less than octuple cheese."