the GNU version of the Collaborative International Dictionary of English
n. resolute adherence to one's own ideas or desires.
The Century Dictionary and Cyclopedia
n. The quality of being bull-headed.
n. Figuratively, blind, unreasoning impetuosity or obstinacy; stupid aggressiveness; blockheadedness.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. resolute adherence to your own ideas or desires
Word Usage
"I have, through years of patience and determined "Yes, they DO make it in left hand" bullheadedness, aquired most of the calibers I wanted except a .17 or .20."