tweet  
 noun [ C ]  informal uk/twiːt/ us/twiːt/
  (BIRD)     
  (小鸟的)啾啾叫,啁啾声
a short, high sound made by a bird
   (SOCIAL MEDIA)     
 trademark发布在推特上的信息 
a short remark or piece of information published on Twitter
 tweet  
verb uk/twiːt/ us/twiːt/
  (BIRD)      
  [ I ](小鸟的)啾啾叫 
When a bird tweets, it makes a short, high sound.
  We could hear the baby birds tweeting. 我们能听到幼鸟在啾啾叫。 
   (SOCIAL MEDIA)      
 [ I or T ]在推特上发布信息 
to publish a short remark or piece of information on Twitter
  He tweeted that he was just about to meet the president. 他发推特说自己即将见到总统。