Definition of "polo shirt" []

• A pullover sport shirt of knitted cotton. (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.

• "Another first-person account: a couple of years ago I was about to take off on a flight to San Francisco when a portly, balding man wearing blue jeans and a polo shirt bearing words something like “Blue Sky Natural Gas Pipelines” entered my row."
• "Victor's "Tommy" polo shirt was green-and-white striped, and Barney's Ralph Lauren was golden brown."
• "He wore a lifeless windbreaker over a yellow Hang-Ten polo shirt and baggy jeans."