one day

idiom

1

: at some time in the future

One day, it'll happen. You'll see.

People may one day be able to take vacations to the moon.

2

: on a day in the past

I went to her house one day and had lunch with her.

One day, we had a terrible argument.

Examples of one day in a Sentence

Recent Examples on the Web

Perry’s prop malfunction occurred just one day after Beyoncé experienced an onstage mishap of her own, when her flying car began to tip over mid-air during her June 29 performance in Houston. —Michaela Zee, Variety, 1 July 2025

Waller's return from retirement happened one day after the Dolphins sent their Pro Bowl tight end from 2024, Jonnu Smith, to the Pittsburgh Steelers in a deal involving Jalen Ramsey and Minkah Fitzpatrick. —Scott Thompson, FOXNews.com, 1 July 2025

Though its legacy has flickered in and out of the national spotlight, a passionate core of diehard supporters continues to believe, clinging to the dream that their beloved ‘Rayos’ will one day rise again. —Ryan Schwartz, TVLine, 1 July 2025

On the day of the friend’s funeral, Thompson had just one day off from her European tour. —Cat Cardenas, Rolling Stone, 30 June 2025

Rhymes for one day

• aaa
• adonais
• alleyway
• alumnae
• anime
• anyway
• arete
• attache
• baa
• beaujolais
• bouvier
• breakaway