Yes, sage is a Scrabble word!

Adjective

1. Having wisdom that comes with age and experience

2. Of the grey-green color of sage leaves

Noun

1. A mentor in spiritual and philosophical topics who is renowned for profound wisdom

2. Aromatic fresh or dried grey-green leaves used widely as seasoning for meats and fowl and game etc

3. Any of various plants of the genus Salvia; a cosmopolitan herb