The rare daily word game sweeping the globe. Find what's hidden in plain sight.
CLAUSTRUM
Definition of CLAUSTRUM
noun
A thin, irregular sheet of grey matter underneath the inner part of the neocortex on both sides of the brains of mammals; its exact function is not understood, but it is believed to facilitate coordination between senses
Wiktionary · CC BY-SA
Where it comes from
Unadapted borrowing from Latin claustrum (“a bolt, bar”). Doublet of cloister.
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.
CLAUSTRUM in OUTLIER
Players have found it on 2 boards so far.
It first turned up on Day 68, 27 July 2026. The most recent board was Day 79, 7 August 2026. Nobody has seen it on a board for 23 days.
First ever to find it
on Day 79, 7 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
CLAUSTRUM starts with C and ends with M. Sorted, its letters read ACLMRSTUU - the shape to hunt for when the grid is scrambled. U appears more than once.
Words that start CLAUST
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found CLAUSTRUM?
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 68 - and most players walked straight past it.
Play today's OUTLIER