Definition of "morning"

Towards the following morning, the thermometer fell to 5°; and at daylight, there was not an atom of water to be seen in any direction.

1835, Sir John Ross, Sir James Clark Ross, Narrative of a Second Voyage in Search of a North-west Passage …, volume 1, pages 284–5

One morning I had been driven to the precarious refuge afforded by the steps of the inn, after rejecting offers from the Celebrity to join him in a variety of amusements. But even here I was not free from interruption, for he was seated on a horse-block below me, playing with a fox terrier.

1897 December (indicated as 1898), Winston Churchill, chapter IV, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd.

Celestina […] retired to her own room, leaving her friend to the pleasing and important occupation of the toilet, in which half of what is now called morning, was usually passed by Matilda.

1791, Charlotte Smith, Celestina, Broadview, published 2004, page 101

We breakfasted before nine, and do not dine till half-past six on the occasion, so I hope we three shall have a long morning enough.

1813, Jane Austen, letter, 26 October