1. a little child, esp. a boy
2. a small amount, degree, extent, etc.often used with a and having adverbial force
⇒ a tad tired
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.