teach·ing (tḗchĭng)

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noun 

1. The act, practice, occupation, or profession of a teacher.
2. 1. Something taught.
   2. A precept or doctrine. Often used in the plural: the teachings of Buddha.

adjective 

1. Of, involving, or used for teaching: teaching materials; teaching methods.
2. Working as a teacher or in teaching: teaching assistants.

teach (tēch)

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[Middle English techen, from Old English tǣcan.]

verb: taught (tôt), teach·ing, teach·es. 

transitive verb 

1. To impart knowledge or skill to: teaches children.
2. To provide knowledge of; instruct in: teaches French.
3. To condition to a certain action or frame of mind: teaching youngsters to be self-reliant.
4. To cause to learn by example or experience: an accident that taught me a valuable lesson.
5. To advocate or preach: teaches racial and religious tolerance.
6. To carry on instruction on a regular basis in: taught high school for many years.

intransitive verb 

To give instruction, especially as an occupation.

synonyms:

teach, instruct, educate, train, school¹discipline, drill¹ These verbs mean to impart knowledge or skill. Teach is the most widely applicable: taught the child to draw; taught literature at the college. Instruct usually suggests methodical teaching: instructed the undergraduates in music theory. Educate often implies formal instruction but especially stresses the development of innate capacities: “We are educated by others … and this cultivation, mingling with our innate disposition, is the soil in which our desires, passions, and motives grow” (Mary Shelley) Train suggests concentration on particular skills intended to fit a person for a desired role: trained the vocational students to be computer technicians. School often implies an arduous learning process: schooled the youngster to play the viola. Discipline usually refers to the teaching of control, especially self-control: disciplined myself to exercise every day. Drill implies rigorous instruction or training, often by repetition of a routine: drilled the students by having them recite the multiplication tables.