Definition of "lethargy"

Europe lay then under a deep lethargy.

1687, Francis Atterbury, An Answer to Some Considerations on the Spirit of Martin Luther and the Original of the Reformation at Oxford‎, page 42

Gradually the darkened room seems to emerge from its shadows; familiar objects strike upon the senses—and memory is never so terribly distinct as on its first reviving from such momentary lethargy.

1834, L[etitia] E[lizabeth] L[andon], chapter XXVII, in Francesca Carrara. […], volume II, London: Richard Bentley, […], (successor to Henry Colburn), page 285

As already indicated, timekeeping is very poor. Point-to-point times are not kept, even with a clear road, and whilst fast running has never been a feature of the route because of the large number of junctions and speed restrictions, this Sunday night lethargy is hard to explain.

1959 March, D. Bertram, “An old friend - the 9.7”, in Trains Illustrated, page 141

Yakovlev, one of the architects of the reforms put in place by Mikhail Gorbachev, says he too is "amazed" at the government's lethargy.

1995 March 20, Bruce W. Nelan, “Crime and Punishment”, in Time‎

The increase in mining stocks helped the FTSE 100 shake off some earlier lethargy and close 9.8 points higher at 6270.8, despite the disappointment of unchanged UK interest rates.

2008 May 9, Nick Fletcher, “Lethargic FTSE lifted by hopes of mining move”, in The Guardian‎

This Apoplexie is (as I take it) a kind of Lethargie, a sleeping of the blood, a horson Tingling.

c. 1599, William Shakespeare, King Henry IV, Part 2

So in order to avoid unpleasant side effects like lethargy and sexual dysfunction, most recent trials also gave men testosterone supplements.

2003 October 20, Amanda Ripley, “At Last, the Pill for Men”, in Time‎