What is a one-person couch called?

A one-person couch is typically called an armchair. 

The sofa is typically defined as a long upholstered piece of seating that features a back and arms and is intended for two or more people. While the term “couch” comes from the Old French couche, meaning to lie down, and sofa has Eastern origins, both are forms of divan, a Turkish word that means an elongated cushioned seat. No matter how you spell it, sofa just means comfort, at least it does today.

Armchairs are among the types of chairs you should know when decorating your home. Most living rooms include at least one armchair. Typically upholstered and including comfortable armrests, armchairs vary by size, style and color, allowing you to use them to make a statement, focus on comfort or show off your personality.

Find a collection of vintage armchairs on 1stDibs.