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fastness

[ fast-nis, fahst- ]
/ ˈfæst nɪs, ˈfɑst- /
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noun
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.
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Origin of fastness

before 900; Middle English; Old English fæstnes.See fast1, -ness
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use fastness in a sentence

British Dictionary definitions for fastness

fastness
/ (ˈfɑːstnɪs) /

noun
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
archaic swiftness

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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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