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lesson (EN)
noun

noun “lesson”

singular lesson, plural lessons or uncountable
  1. a set time during which someone is taught
    He took guitar lessons every Thursday after school.
  2. a part of a broader educational content
    Today's math lesson focused on fractions and how to simplify them.
  3. an experience, particularly a bad one, from which someone can learn to avoid similar situations in the future
    Getting lost in the woods taught him a valuable lesson about always carrying a map.
  4. a passage from the Bible or another sacred text that is read during a religious service
    The priest announced, "Today's lesson is from the Book of Psalms," before he began to read.