long since

adverb

1

: long ago

promises long since forgotten

2

: for a long time

has long since been a devoted friend

Examples of long since in a Sentence

Recent Examples on the Web

Without this second source, Earth would have long since cooled off and become a tectonically dead planet. — James Dinneen, Quanta Magazine, 7 Aug. 2026

Advertisement Senior year is starting and the group’s parents have long since checked out. — Judy Berman, Time, 5 Aug. 2026

Yet much of the public has long since stopped perceiving him as such. — Katherine J. Wu, The Atlantic, 28 July 2026

The signatories appealed to the festival to double down on its 2018 pledge to achieve parity by 2020, even if the deadline has long since expired. — Melanie Goodfellow, Deadline, 27 July 2026

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for long since

• convince
• evince
• mince
• prince
• quince
• rinse
• wince