Is ST a valid Scrabble word?

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

What ST means

• interjection - Expressing a sudden desire for silence.
• noun - Abbreviation of state.
• verb - To act as a game master (GM) in a tabletop role-playing game, especially any of the games produced by White Wolf.

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

Gramlet is a daily word game played with the same Collins list. Play today's board.