lesson — In the Classroom lesson /ˈlesn/ noun CEFR A1 A period of time when a teacher teaches a subject. “Our maths lesson starts at nine.” Related words in this scene boardtimetableclockwindowdoorwallshelfposterquietchairdeskquestionanswerlistenreadwriteteacherclassroompupilstudentbookchalkmarkerhomeworkclassgrouplearnteachraisecleverrow Practice this word Create worksheet