Is ONLY a valid Scrabble word?

Yes. ONLY is valid in Collins Scrabble Words 2024, the word list used for Scrabble in the UK.

What ONLY means

• adjective - Alone in a category.
• adverb - Without others or anything further; exclusively.
• conjunction - Introduces a clause with negative polarity, often one which upsets the listener's expectations.
• noun - An only child.

Definitions come from Wiktionary via kaikki.org, shortened to fit, and are used under CC BY-SA 4.0.

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