Meaning : An unvarying or habitual method or procedure.

Synonyms : modus operandi

Meaning : A short performance that is part of a longer program.

Example : He did his act three times every evening.
She had a catchy little routine.
It was one of the best numbers he ever did.

Synonyms : act, bit, number, turn

Meaning : A set sequence of steps, part of larger computer program.

Synonyms : function, procedure, subprogram, subroutine

Meaning : Found in the ordinary course of events.

Example : A placid everyday scene.
It was a routine day.
There's nothing quite like a real...train conductor to add color to a quotidian commute.

Synonyms : everyday, mundane, quotidian, unremarkable, workaday