A term that is thrown about a lot these days, but it means anything from the past, or second hand, when clothing happens to have been worn previously.
Generally clothing older than 25 years is considered as vintage. Vintage clothing can also be clothing that has not been worn before, but stored in its original state, and is referred to as ‘deadstock’ vintage.
Source: Nouvelle de Nîmes Nº 5: The Denim Dictionary