[1] : The Collaborative International Dictionary of English v.0.48

reign \reign\ r?n, v. i. imp.  p. p. reigned r?nd; p.
   pr.  vb. n. reigning. oe. regnen, reinen, of. regner, f.
   r'egner, fr. l. regnare, fr. regnum. see reign, n.
   1. to possess or exercise sovereign power or authority; to
      exercise government, as a king or emperor;; to hold
      supreme power; to rule. --chaucer.
      1913 webster

            we will not have this man to reign over us. --luke
                                                  xix. 14.
      1913 webster

            shall banquo's issue ever
            reign in this kingdom?                --shak.
      1913 webster

   2. hence, to be predominant; to prevail. "pestilent diseases
      which commonly reign in summer." --bacon.
      1913 webster

   3. to have superior or uncontrolled dominion; to rule.
      1913 webster

            let not sin therefore reign in your mortal body.
                                                  --rom. vi. 12.
      1913 webster

   syn: to rule; govern; direct; control; prevail.
        1913 webster
see also:
reigned reigning reign 

[2] : The Collaborative International Dictionary of English v.0.48

reign \reign\ r=an, n. oe. regne, of. reigne, regne, f.
   r`egne, fr. l. regnum, fr. rex, regis, a king, fr. regere
   to guide, rule. see regal, regimen.
   1. royal authority; supreme power; sovereignty; rule;
      dominion.
      1913 webster

            he who like a father held his reign.  --pope.
      1913 webster

            saturn's sons received the threefold reign
            of heaven, of ocean, and deep hell beneath. --prior.
      1913 webster

   2. the territory or sphere which is reigned over; kingdom;
      empire; realm; dominion. obs. --spenser.
      1913 webster

            god him bereft the regne that he had. --chaucer.
      1913 webster

   3. the time during which a king, queen, or emperor possesses
      the supreme authority; as, it happened in the reign of
      elizabeth.
      1913 webster
see also:
regal regimen 

[3] : WordNet (r) 2.0

reign
     n 1: a period during which something or somebody is dominant or
          powerful; "he was helpless under the reign of his
          egotism"
     2: the period during which a monarch is sovereign; "during the
        reign of henry viii"
     3: royal authority; the dominion of a monarch syn: sovereignty
     v 1: have sovereign power; "henry viii reigned for a long time"
     2: be larger in number, quantity, power, status or importance;
        "money reigns supreme here"; "hispanics predominate in
        this neighborhood" syn: predominate, dominate, rule,
         prevail
see also:
sovereignty predominate dominate rule prevail 

[4] : Moby Thesaurus II by Grady Ward, 1.0

125 moby thesaurus words for "reign":
   administration, ascendancy, authority, averageness, be in,
   be in force, be the rage, be the rule, be the thing, bear reign,
   call the shots, charisma, charm, civil government, claws, clout,
   clutches, command, commonality, commonness, consequence, control,
   credit, currency, direct, direction, discipline, dispensation,
   disposition, dominance, dominate, domination, domineer, dominion,
   effect, eminence, empery, empire, enchantment, esteem,
   extensiveness, favor, force, form of government, good feeling,
   govern, governance, government, grip, habitualness, hand, hands,
   hegemony, hold, importance, incidental power, influence,
   influentiality, insinuation, iron hand, jurisdiction, kingdom,
   lead, leadership, leverage, magnetism, manage, management, mastery,
   moment, monarchy, normality, obtain, ordinariness, overrule,
   oversight, personality, persuasion, political organization, polity,
   potency, power, predominance, predominate, preponderance,
   preponderate, pressure, prestige, prevail, prevalence, purchase,
   raj, rampantness, regime, regimen, regnancy, regulation, repute,
   rifeness, routineness, rule, rule over, rule the roost, run, say,
   sovereignty, standardness, suasion, subtle influence, suggestion,
   supervise, supervision, supremacy, suzerainty, sway, sweepingness,
   system of government, talons, upper hand, usualness,
   wear the crown, weight, whip hand, widespreadness,
   wield the scepter

Reign >> R Words
Reign, definition of term: Reign
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Reign Of Terror >> R Words
Reign Of Terror, definition of term: Reign Of Terror
reign+of+terror_pag1.html