first floor

American  

noun

1. the ground floor of a building.

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

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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

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Etymology

Origin of first floor

First recorded in 1655–65

Example Sentences

The first floor has items from the young Obama's life, including a cast of his handprint.

From Barron's • Jun. 4, 2026

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

“The primary suite on the first floor features a 900-square-foot bedroom and a 1,000-square-foot spa-style bathroom, equipped with a Finnish dry sauna and steam sauna imported from Finland,” the listing reads.

From MarketWatch • Apr. 23, 2026

Freebie and Felix rode the elevator down to the first floor.

From "Millionaires for the Month" by Stacey McAnulty