1. [adjective] Wise.
2. [adjective] (obsolete) grave; serious; solemn
3. [noun] A wise person or spiritual teacher; a man or woman of gravity and wisdom, especially, a teacher venerable for years, and of sound judgment and prudence; a grave or stoic philosopher.
4. [noun] The plant Salvia officinalis and savory spice produced from it; also planted for ornamental purposes.
5. [noun] Any plant in the genus Salvia
6. [noun] Any of a number of plants such as sagebrush considered to be similar to Salvia officinalis, mostly because they are small shrubs and have gray foliage or are aromatic.
7. [interjection] (Internet slang) Word used in the email field of imageboards to prevent a bump of the post. Used as an option rather than a word in some imageboard software.
8. [verb] (Internet slang) The act of using the word or option sage in the email field or a checkbox of an imageboard when posting a reply
9. [noun] A mentor in spiritual and philosophical topics who is renowned for profound wisdom.
10. [noun] Aromatic fresh or dried grey-green leaves used widely as seasoning for meats and fowl and game etc.
11. [noun] Any of various plants of the genus Salvia; a cosmopolitan herb.
12. [adjective] Having wisdom that comes with age and experience.
13. [adjective] Of the grey-green color of sage leaves.