(n): what a communication that is about something is about
(n): the activities of educating or instructing; activities that impart knowledge or skill
(n): any specific behavior
(n): the profession of a teacher
(n): the profession of teaching (especially at a school or college or university)
(n): (computer science) a line of code written as part of a computer program
(n): (computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions
