sage

Etymology 1

From Middle English sage, from Old French sage (11th century), from Latin *sapius, from Latin sapere (“to taste, to discern, to be wise”). The noun meaning "man of profound wisdom" is recorded from circa 1300. Originally applied to the Seven Sages of Greece.

adj

1. wise.
2. (obsolete) grave; serious; solemn

noun

1. 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.
   We aspire to the magnanimous firmness of the philosophic sage. 1748, David Hume, Enquiries concerning the human understanding and concerning the principles of moral, London: Oxford University Press (1973), section 34

Etymology 2

From Middle English sauge, from Middle French sauge, from Old French salje, from Latin salvia, from salvus (“healthy”), see safe.

noun

1. The plant Salvia officinalis and savory spice produced from it; also planted for ornamental purposes.
2. Any plant in the genus Salvia
3. 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.

Etymology 3

Borrowed from Japanese sage, from Japanese 下げる (sageru, “to lower”). From 2channel.

intj

1. (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.
   sage in all fields

verb

1. (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.
   Reminder to sage and report.