n. [ AS. fæstnes, fr. fæst fast. See Fast, a. ]
All . . . places of fastness [ are ] laid open. Sir J. Davies. [ 1913 Webster ]
n. The quality or state of being steadfast; firmness; fixedness; constancy. “The steadfastness of your faith.” Col. ii. 5. [ 1913 Webster ]
To prove her wifehood and her steadfastness. Chaucer. [ 1913 Webster ]