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"one" is also used as a crossword clue. If that's what you saw, the answer is often unitary (7 letters).
Definitions
Single person or thing
Word origin
From Middle English oon, on, oan, an, from Old English ān (“one”), from Proto-West Germanic *ain, from Proto-Germanic *ainaz (“one”), from Proto-Indo-European *h₁óynos (“single, one”). Doublet of an.
Used in a sentence
“In some religions, there is more than one god.”
“In many cultures, a baby turns one year old a year after its birth.”
“One person, one vote.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer9 curated clues
01“A single item”3 letters
02“First counting number”3 letters
03“First positive integer”3 letters
04“Number before two”3 letters
05“Single count”3 letters
06“Single number”3 letters
07“Solo count”3 letters
08“Single unit”3 letters
09“Number after zero”3 letters
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