lesson /ˈlɛs.ən/noun 7verb 2forms 3phrases 1 noun7 •a short part of a course of study, taught or learned at one timeIn our school a typical working week consists of around twenty lessons and ten hours of related laboratory work. •Something learned or to be learned.Nature has many lessons to teach to us. •Something that serves as a warning or encouragement.I hope this accident taught you a lesson!The accident was a good lesson to me. •A learning task assigned to a student; homework. •An exercise; a composition serving an educational purpose; a study. •A severe lecture; reproof; rebuke; warning.She would give her a lesson for walking so late. — 1587 •A section of the Bible or other religious text read as part of a divine service.Here endeth the first lesson. verb2 •To give a lesson to; to teach.her owne daughter Pleasure, to whom shee Made her companion, and her lessoned In all the lore of loue, and goodly womanhead. — 1590 •(no longer used) To instruct to teach.And you, my sister—you, who lesson me on endurance, your cheek is pale, and your step languid; even with you, how much has life lost its interest! — 1834 formslessoned · lessoning · lessons Phrases with lesson teach someone a lessonTo punish someone for a serious transgression they have committed so that they do not commit it again.