Meaning:

• Wind
• Breath
• Spirit

Noun. Occurs about 380 times in the Old Testament.

The word רוּחַ (ruach) is a richly layered term with several interconnected meanings depending on context. It is one of the most theologically significant words in Scripture.

The root idea is movement of air, which naturally extends into several related senses:

• Wind – a literal breeze or storm (e.g., “wind of the sea” in Exodus 10:13plugin-autotooltip__default plugin-autotooltip_bigExodus 10:13
  
  Hebrew וַיֵּ֨ט מֹשֶׁ֣ה אֶת מַטֵּהוּ֮ עַל אֶ֣רֶץ מִצְרַיִם֒ וַֽיהוָ֗ה נִהַ֤ג ר֥וּחַ קָדִים֙ בָּאָ֔רֶץ כָּל הַיּ֥וֹם הַה֖וּא וְכָל הַלָּ֑יְלָה הַבֹּ֣קֶר הָיָ֔ה וְר֨וּחַ֙ הַקָּדִ֔ים נָשָׂ֖א אֶת הָאַרְבֶּֽה ESV So Moses stretched out his staff over the land of Egypt, and the LORD brought an east wind upon the land all that day and all that night. When it was morning, the east wind had brought the locusts. καὶἐπῆρεντὴνῥάβδονεἰςτὸνοὐρανόνκαὶκύριοςἐπήγαγενἄνεμοννότονἐπὶτὴνγῆνὅληντὴνἡμέρα…
• Breath – the animating force in living beings (e.g., “the breath of life” in <autott>genesis_6:17|Genesis 6:17).
• Spirit – an invisible, life-giving, and personal force—whether human, angelic, or divine

So רוּחַ can refer to anything from a physical wind to the spiritual presence of God.