a secure or fortified place; stronghold: a mountain fastness.
the state of being fixed or firm: the fastness of democratic institutions.
the state of being rapid.
Origin of fastness
before 900; Middle English; Old English fæstnes.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for fastness
Historical Examples of fastness
His spirit retired far into its fastness, taking with it all his energies.
Hardened men with a hardened code, they lived in their fastness like Ishmaelites.
He advised a retreat for the night, and an attack on Walter when he should have left the fastness.
What is meant by the expression “fastness of color of two fabrics”?
I did not come to you and say, 'Let me beard the cook in her fastness.
British Dictionary definitions for fastness
a stronghold; fortress
the state or quality of being firm or secure
the ability of a dye to remain permanent and not run or fade
Word Origin for fastness
Old English fæstnes; see fast 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for fastness
"a place not easily forced, a stronghold," late Old English fæstnes, from fast (adj.) in its older sense of "firm, fixed in place" + -ness.
Online Etymology Dictionary, © 2010 Douglas Harper