To point out; direct; show.To show how (to do something); hence, to train: as, to teach a dog to beg; to teach a boy to swim.To tell; inform; instruct; explain; show.To impart knowledge or practical skill to; give instruction to; guide in learning; educate; instruct.To impart a knowledge of; give instruction in; give lessons in; instruct or train in understanding, using, managing, handling, etc.: as, to teach mathematics or Greek.Synonyms To enlighten, school, tutor, indoctrinate, initiate.To impart, inculcate, instil, preach. See instruction.To give instruction; give lessons as a preceptor or tutor; impart knowledge or skill; instruct.n. Same as tache.