flexbox
noun
flexbox is a noun meaning “A CSS3 layout model that allows elements on a web page to be arranged in certain ways within a one-dimensional container” (English Wiktionary, September 2026). It is spelled F-L-E-X-B-O-X, and it appears about once in every 26 million words in written English (wordfreq, 2021 data). The plural of flexbox is flexboxes.
What does flexbox mean?
noun
- 1
A CSS3 layout model that allows elements on a web page to be arranged in certain ways within a one-dimensional container.
Internet Explorer 9 does not support flexbox.
- 2
An HTML element that uses this model.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of flexbox
- flexboxes plural
- flex box
- flex-box
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is flexbox?
Flexbox appears about once in every 26 million words in written English, the 154,067th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does flexbox come from?
Shortening of flexible box.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).