Definition of "flinty" []

• Containing or composed of flint. (adjective)
• Unyielding; stern: a flinty manner. (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.

• "He jerked his head at Helen as he passed the Cells office on his way out, his expression flinty; Helen scrambled to keep up as he strode away."
• "He used one of his favorite terms -- "flinty" -- to describe Mr. Simpson."
• ""I have the tenacity of a Dagny Taggart," says Mr. Aglialoro, referring to the flinty heroine of "Atlas Shrugged.""