Not here talking about meaning, but usage. Just reminiscing of some words we used to use around here, or used differently. I will give the word following by a dictionary definition.
Dinner - the main meal of the day, eaten in the evening or at midday. Around here older folks call the noon meal dinner and the night meal supper, while younger folks tend to call the noon meal lunch and the night meal supper. I guess the meaning hasn't changed, but which meal is the main meal of the day for most people?
Divan - a sofa or couch, often without arms or back. We always called the "couch" a "divan", but I seldom hear that anymore.
Gallery - a long porch or portico; veranda. This one was goning by the wayside by the time I came along, but the older folks still used it. I've always called a "porch" porch.
Galluses – a pair of suspenders for trousers. Another in process by the time I saw the light of day, probably because weren't many people wearing galluses anymore. When the made their comeback, slight as it was, they were suspenders.
Stoop - a small porch. Often not even much of a porch, but at least steps and a cover on them.
What words have you noticed change or gone out of common usage?