Definition of "inwards"

As well as their obvious novelty value, the Class 313s offered fast acceleration, those power-operated sliding doors, non-opening passenger windows, closed ventilators to prevent any body part, head or limbs reaching out, drivers' and guards' doors opening inwards, and end doors for emergency exit.

2023 February 22, Howard Johnston, “Southern '313s': is the end now in sight?”, in RAIL, number 977, page 42

So I went up and down, and through the street, and down to the harbour-side, like a dog that has lost its master, with a strange gnawing in my inwards, and every now and then a movement of despair.

1886 May 1 – July 31, Robert Louis Stevenson, Kidnapped, being Memoirs of the Adventures of David Balfour in the Year 1751: […], London, Paris: Cassell & Company, published 1886