Antique means Old and the general consensus is that Antique furniture is about or more than 100 years old. It’s usually made by highly skilled and sometimes famous craftsmen and cabinet makers. Commonly made of solid wood, sometimes with expensive veneers and marquetry applied it commonly has some signs of wear and tear from use over the years. It’s also unlikely to be second hand with more like four or more previous owners having taken care of a piece of a beautiful furniture. Good quality Antique furniture is good value as it has stood the test of time and tends to retain its value.
Vintage refers to items that are between 30 and 100 years old. Higher quality items are still made of solid wood but chipboard was increasingly used by some brands. Good quality vintage Danish design furniture is currently increasing in demand and scarcity.
Retro refers to goods and furniture that has been made in a style similar to those used in the past. Most retro stock isn’t very old but it can have some age whilst mimicking much older designs. You may have seen Retro signs and toys that have been made recently but they mimic goods made in the 50s for example.
The information given here is offered as a guide.