Noun
1. a message describing how something is to be done;
"he gave directions faster than she could follow them"2. the activities of educating or instructing or teaching; activities that impart knowledge or skill;
"he received no formal education""our instruction was carefully programmed""good teaching is seldom rewarded"3. the profession of a teacher;
"he prepared for teaching while still in college""pedagogy is recognized as an important profession"4. (computer science) a line of code written as part of a computer program