Meaning

• A course of action to be followed regularly; a standard procedure.

• A set of normal procedures, often performed mechanically.

  "Connie was completely robotic and emotionless by age 12; her entire life had become one big routine."

• A set piece of an entertainer's act.

  "stand-up comedy routine"

• A set of instructions designed to perform a specific task; a subroutine.

Meaning

• According to established procedure.

• Regular; habitual.

• Ordinary with nothing to distinguish it from all the others.