The rare daily word game sweeping the globe. Find what's hidden in plain sight.
BIPLANE
Definition of BIPLANE
adjective
Composed of, or relating to, two planes (flat surfaces extending infinitely in all directions).
Wiktionary · CC BY-SA
Where it comes from
From bi- + plane.
Etymology via Wiktionary (CC BY-SA).
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
BIPLANE in OUTLIER
Players have found it on 5 boards so far.
It first turned up on Day 31, 20 June 2026. The most recent board was Day 100, 28 August 2026. It was on the latest finished board.
First ever to find it
on Day 31, 20 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
BIPLANE starts with B and ends with E. Sorted, its letters read ABEILNP - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
One other word uses exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Also seen on Day 31
Could you have found BIPLANE?
OUTLIER is a daily word game. One grid, the same grid for everybody, and the words nobody else spots are the ones that pay. This word was on Day 31 - and most players walked straight past it.
Play today's OUTLIER