What does "third-class" mean?

Most inferior in quality or standing.

What is a synonym for "third-class"?

Common synonyms include: base, cheap, cheesy, coarse, common, fourth class.

adj

adj ·Rare ·Advanced level

Adjective

1
Most inferior in quality or standing. not-comparable
"Travelling third-class isn't just slow, it's painful."

"Travelling third-class isn't just slow, it's painful."