“Short Line” in Monopoly is the fourth railroad space on the standard U.S. board. It’s the railroad that lets you collect rent like the others, and it’s usually thought of as the least likely railroad space to be landed on.

Here’s the quick meaning:

  • It is one of the four railroads: Reading, Pennsylvania, B&O, and Short Line.
  • It costs $200 to buy.
  • Rent increases based on how many railroads you own: $25, $50, $100, or $200.
  • Unlike the other three railroads, Short Line was not based on a real railroad company ; it was added to fill the board’s fourth railroad slot.

In plain English, if someone says “I landed on Short Line,” they mean the Monopoly railroad space near the end of the board, not a special rule or separate game item.