pesto definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an Italian sauce that is a purée of fresh basil, garlic, pine nuts, and Parmesan cheese in olive oil, used esp. over pasta
Origin: Italian past participle of pestare, to pound, grind ; from Classical Latin pinsere: see pestle
pesto definition by American Heritage Dictionary
A sauce consisting of usually fresh basil, garlic, pine nuts, olive oil, and grated cheese.
Origin: Italian, from past participle of pistare, pestare, to pound; see piston.