lecture          
 noun [ C ] uk/ˈlek.tʃər/ us/ˈlek.tʃɚ/
B1 (尤指面向学生的)讲座,课
a formal talk on a serious subject given to a group of people, especially students
  We went to a lecture on Italian art. 我们去参加了一个关于意大利艺术的讲座。 
 Who's giving the lecture this afternoon? 今天下午的课由谁来讲? 
 Compare: seminar
  教训,训斥,斥责
an angry or serious talk given to someone in order to criticize their behaviour
  My dad gave me a lecture on the evils of alcohol last night. 昨天晚上爸爸教训了我一顿,给我讲了酒的危害。 
 - More examples
 - At the end of the lecture, I'd like all the students to divide into small discussion groups.
 - I couldn't help drifting off in the middle of that lecture - it was so boring!
 - I got the fidgets halfway through the lecture.
 - His lecture was complicated and difficult to follow.
 - I didn't gather much from his lecture.
 
lecture          
verb uk/ˈlek.tʃər/ us/ˈlek.tʃɚ/
C2 [ I ](常指在大学里)讲课,讲授 
to give a formal talk to a group of people, often at a college or university
  For ten years she lectured in law. 她教了10年的法律课。 
 She travelled widely in North America, lecturing on women's rights. 她到北美各地宣讲妇女的权利。 
  [ T ]教训,训斥,斥责 
to talk angrily or seriously to someone in order to criticize their behaviour
  His parents used to lecture him on his table manners. 以前他的父母经常批评他的餐桌礼仪。