A person, animal, or object believed to bring good luck, especially one kept as the symbol of an organization such as a sports team.(noun)
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 "mascot" in a sentence
"Stanford Cardinal (their mascot is a tree – meaning they only scare the minions of Isengard)"
"Reading up on Uga on wikipedia, the mascot is air conditioned and sits on bags of ice at games because the breed is susceptible to heart stroke."
"I think it has something to do with the fact that their mascot is a sock monkey."