Definition of "routine"

It is never possible to settle down to the ordinary routine of life at sea until the screw begins to revolve. There is an hour or two, after the passengers have embarked, which is disquieting and fussy.

1915, G[eorge] A. Birmingham [pseudonym; James Owen Hannay], chapter I, in Gossamer, New York, N.Y.: George H. Doran Company

Pepper's forgiven me in the quiet, hurt way women sometimes forgive. She doesn't cry. She doesn't smile either. She's being routine.

1993, Tristan Hawkins, Pepper, London: Flamingo, page 108

Whether modern, industrial man is less or more warlike than his hunter-gatherer ancestors is impossible to determine. […] One thing that is true, though, is that murder rates have fallen over the centuries, as policing has spread and the routine carrying of weapons has diminished. Modern society may not have done anything about war. But peace is a lot more peaceful.

2013 July 20, “Old soldiers?”, in The Economist, volume 408, number 8845

Stoke put themselves in a fine position to qualify for the Europa League knockout stage with a routine victory over Maccabi Tel-Aviv in Israel.

2011 November 3, David Ornstein, “Macc Tel-Aviv 1-2 Stoke”, in BBC Sport