teach
verb
tiːtʃ 
tiːtʃ tɔːt tɔːt 
1 [intransitive, transitive] to give lessons to students in a school, college, university, etc; to help somebody learn something by giving information about itShe teaches at our local school.He taught for several years before becoming a writer.teach something I'll be teaching history and sociology next term. (North American English) to teach school (= teach in a school)teach something to somebody He teaches English to advanced students.teach somebody something He teaches them English.2 [transitive] to show somebody how to do something so that they will be able to do it themselvesteach (somebody to do) something Could you teach me to do that?teach somebody how, what, etc… My father taught me how to ride a bike.3 [transitive] to make somebody feel or think in a different wayteach somebody to do something She taught me to be less critical of other people.teach (somebody) that… My parents taught me that honesty was always the best policy.teach somebody something Our experience as refugees taught us many valuable lessons.4 [transitive, no passive] (informal) to persuade somebody not to do something again by making them suffer so much that they are afraid to do itteach somebody to do something Lost all your money?That'll teach you to gamble.I'll teach you to call (= punish you for calling) me a liar!teach somebody something The accident taught me a lesson I'll never forget.Idioms
teach your grandmother to suck eggs
(British English, informal) to tell or show somebody how to do something that they can already do well, and probably better than you can(you can't) teach an old dog new tricks
(saying) (you cannot) successfully make people change their ideas, methods of work, etc, when they have had them for a long timeteach to the test
to teach students only what is necessary in order to pass a particular test, rather than help them develop a range of skills
Usage note: Teach and teachersVerbsteachJohn teaches French at the local school. ◇ She taught me how to change a tyre.educateOur priority is to educate people about the dangers of drugs.instructMembers of staff should be instructed in the use of fire equipment.trainShe’s a trained midwife. ◇ He’s training the British Olympic swimming team.coachHe’s the best football player I’ve ever coached. ◇ She coaches some of the local children in maths. (British English)tutorShe tutors some of the local children in math. (North American English)Nounsteacherschool/college teachersinstructora swimming/science instructortrainera horse trainer ◇ Do you have a personal trainer?coacha football coachtutortutors working with migrant children