sage

A wise person or spiritual teacher; someone of gravity and wisdom, especially, a teacher venerable for years, and of sound judgment and prudence; a grave or stoic philosopher.

Wise.

Grave; serious; solemn

The plant Salvia officinalis and savory spice produced from it; also planted for ornamental purposes.

Any plant in the genus Salvia

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.

The act of using the word or option sage in the email field or a checkbox of an imageboard when posting a reply.

“Reminder to sage and report.”

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.

“sage in all fields”