From Nordan Symposia
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alteration of Middle English demayne, from Anglo-French demeine, from Latin dominium, from dominus


  • 1 a : complete and absolute ownership of land — compare eminent domain
b : land so owned
  • 2 : a territory over which dominion is exercised
  • 3 : a region distinctively marked by some physical feature <the domain of rushing streams, tall trees, and lakes>
  • 4 : a sphere of knowledge, influence, or activity <the domain of art>
  • 5 : the set of elements to which a mathematical or logical variable is limited; specifically : the set on which a function is defined
  • 6 : any of the small randomly oriented regions of uniform magnetization in a ferromagnetic substance
  • 7 : integral domain
  • 8 : the highest taxonomic category in biological classification ranking above the kingdom
  • 9 : any of the three-dimensional subunits of a protein that are formed by the folding of its linear peptide chain and that together make up its tertiary structure
  • 10 : a subdivision of the Internet consisting of computers or sites usually with a common purpose (as providing commercial information) and denoted in Internet addresses by a unique abbreviation (as com or gov); also : domain name