first floor

American  

noun

1. the ground floor of a building.

2. the floor above the ground floor of a building.

---

first floor British  

noun

1. US and Canadian term: second floor.  the floor or storey of a building immediately above the ground floor

2. another term for ground floor

---

Etymology

Origin of first floor

First recorded in 1655–65

Example Sentences

Folks living there can see live DJs, score priority festival tickets, and dance at a club on the first floor.

From The Wall Street Journal • May 19, 2026

The museum, on the first floor, is a re-creation of “Skeldale House,” down to the pint pot in which Siegfried kept the petty cash and the old central telephone.

From Los Angeles Times • May 14, 2026

Meanwhile, we stay on the first floor with the baby while he practices upstairs on the second floor.

From MarketWatch • May 4, 2026

As he reached the first floor landing, the officer saw Bosh standing with his back to the lift doors in a slight recess.

From BBC • Mar. 17, 2026

We went up in the lift to the first floor, and so along the passage.

From "Rebecca" by Daphne du Maurier