Definition of "month"

Economics is a messy discipline: too fluid to be a science, too rigorous to be an art. Perhaps it is fitting that economists’ most-used metric, gross domestic product (GDP), is a tangle too. GDP measures the total value of output in an economic territory. Its apparent simplicity explains why it is scrutinised down to tenths of a percentage point every month.

2013 August 3, “Boundary problems”, in The Economist, volume 408, number 8847

Charles had not been employed above six months at Darracott Place, but he was not such a whopstraw as to make the least noise in the performance of his duties when his lordship was out of humour.

1959, Georgette Heyer, chapter 1, in The Unknown Ajax

With the north London derby to come at the weekend, Spurs boss Harry Redknapp opted to rest many of his key players, although he brought back Aaron Lennon after a month out through injury.

2011 September 29, Jon Smith, “Tottenham 3-1 Shamrock Rovers”, in BBC Sport

Sckenkius hath two other instances of two melancholy and mad women, so caused from the suppression of their months.

1624, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: Printed by John Lichfield and James Short, for Henry Cripps