fixity meaning and definition

FIXITY noun

Definition of fixity (noun)

1. the quality of being fixed in place as by some firm attachment
   • synonyms: fastness, fixedness, fixture, secureness
   • antonym: looseness
2. the quality of being incapable of mutation
   • "Darwin challenged the fixity of species"
   • synonyms: immutability, immutableness
   • antonym: mutability