Noun | 1. | ![]() quality - an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare absoluteness - the quality of being absolute; "the absoluteness of the pope's decree could not be challenged" constancy, stability - the quality of being enduring and free from change or variation; "early mariners relied on the constancy of the trade winds" innateness - the quality of being innate irreversibility - the quality of being irreversible (once done it cannot be changed) unalterability, fixedness - the quality of being fixed and unchangeable; "the fixedness of his gaze upset her" unexchangeability - the quality of being incapable of exchange or interchange immutability, immutableness, fixity - the quality of being incapable of mutation; "Darwin challenged the fixity of species" |