lesson
UK: ˈles.ən | US: ˈles.ən
n. a period of learning or teaching; a unit of instruction
n. something learned through experience; a moral or practical insight
n. (archaic) a passage from sacred writings read during worship
The word "lesson" traces back to Old French leçon, derived from Latin lectio (meaning "a reading"), which comes from legere ("to read"). The morpheme less preserves the Old French/Latin root meaning "to read," while -on acts as a noun-forming suffix. Over time, the meaning expanded from "a reading" to "an instructional unit," reflecting the medieval practice of learning through recited texts.
She prepared a grammar lesson for her students.
The accident taught him a valuable lesson about speeding.
The priest delivered a lesson from the Gospel.
Each piano lesson lasts 45 minutes.
History offers many lessons for modern policymakers.