The noun routine has 3 senses (first 3 from tagged texts)
1. (10) routine, modus operandi -- (an unvarying or habitual method or procedure)
2. (2) act, routine, number, turn, bit -- (a short theatrical performance that is part of a longer program; "he did his act three times every evening"; "she had a catchy little routine"; "it was one of the best numbers he ever did")
3. (1) routine, subroutine, subprogram, procedure, function -- (a set sequence of steps, part of larger computer program)
Overview of adj routine
The adj routine has 2 senses (first 2 from tagged texts)
1. (3) routine -- (occurring at fixed times or predictable intervals; "made her routine trip to the store")
2. (2) everyday, mundane, quotidian, routine, unremarkable, workaday -- (found in the ordinary course of events; "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"- Anita Diamant)