In the United States, spinster is the legal term used to refer to a woman who has never married, just as the male counterpart of bachelor refers to a man who has never married. Once men and women are married, they can never revert to the state of never married. These legal terms bear no other connotations.
Who would you call a spinster in our society today?
The word spinster was used to refer to single women between the ages of 23-26, while thornback is reserved for those 26 and above, writer Sophia Benoit discovered. The word is also detailed on the (of course, highly official) Urban Dictionary which describes it as: An old, single, never-married woman.
What is a spinster woman?
A single woman who is old enough to be married but isnt—and isnt likely to get married—is sometimes called a spinster. The word has an old-fashioned and dated feel to it, and because of that it can carry a whiff of impoliteness in certain circumstances.