Definition of "tenacious" []

• Holding or tending to hold persistently to something, such as a point of view. (adjective)
• Holding together firmly; cohesive: a tenacious material. (adjective)
• Clinging to another object or surface; adhesive: tenacious lint. (adjective)
• Tending to retain; retentive: a tenacious memory. (adjective)

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.

• "May 29 Bloomberg -- U.S. agencies offered assistance to Lockheed Martin Corp., the world's largest defense contractor, which suffered what it called a "tenacious" cyber attack on its computer networks on May 21."
• "San Antonio was tenacious from the start, getting an immediate offensive rebound, then trapping Allen and forcing him to throw a bad pass that Ginobili stole."
• "Again Ivy gave that shrug, but her expression was tenacious."