A course of action to be followed regularly; a standard procedure. / A set of normal procedures, often performed mechanically. / A set piece of an entertainer's act.

According to established procedure. / Regular; habitual. / Ordinary with nothing to distinguish it from all the others.

In a routine manner, in a way that has become common or expected. / Done by rote or habit, as part of a routine, without attention or concern.

plural of routine

Controlled or regulated by routine.

The state or quality of being routine, of possessing the traits of being quotidian, and repeating a pattern regularly

(jazz) A jazz musician who plays by ear (i.e. not using sheet music, but rather following along with the band and memorizing music when needed).

plural of routiner

plural of routineer

One who follows routine rather than innovating.