from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An attitude of determined endurance or restraint in the face of adversity.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The quality of being resolute and showing self-restraint, stereotypically associated with the British; especially as keep a stiff upper lip.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. self-restraint in the expression of emotion (especially fear or grief)
American in origin; earliest known use in 1815 . (Wiktionary)