reign          
 verb [ I ] uk/reɪn/ us/reɪn/
C2 为王,为君;当政;统治
to be the king or queen of a country
  Queen Victoria reigned over Britain from 1837 to 1901. 维多利亚女王自1837年到1901年间在位统治英国。 
 C2 主宰;起支配作用;盛行
to be the main feeling or quality in a situation or person
  The bomb attacks produced a panic which reigned over the city. 炸弹袭击引起的恐慌笼罩全城。 
 Love reigned supreme in her heart. 爱情完全占据了她的心。 
 - More examples
 - How long did Queen Elizabeth reign?
 - He only reigned for three years.
 - Queens have reigned in Britain for 111 of the last 163 years.
 - He reigned during some of the most turbulent times in English history.
 - Confusion reigned as explosions erupted.
 
reign          
noun [ C ] uk/reɪn/ us/reɪn/
C1 为王,为君;当政;统治
the period of time when a king or queen rules a country
  the reign of Henry VIII 亨利八世的统治 
  主宰(或支配)的时期
a period when a particular person, feeling, or quality is very important or has a strong influence
  his successful reign as manager of the team 他作为经理对这个小组的成功驾驭 
 Idiom  
a reign of terroridiom  恐怖统治(时期)
a period of time when a ruler controls people in a violent and cruel way