instruction (Noun) — A message describing how something is to be done. ex. "he gave instructions faster than she could follow them"
instruction (Noun) — The activities of educating or instructing; activities that impart knowledge or skill. ex. "our instruction was carefully programmed"
instruction (Noun) — The profession of a teacher. ex. "he prepared for instruction while still in college"
instruction (Noun) — (computing) a line of code written as part of a computer program.