instruction, Japanese character reading, explanation, read
訓 centers on conveying meaning through words: teaching, explaining, or reading aloud. The sense of a Japanese character reading (kun'yomi) is a specialized application of reading or interpreting a character's meaning.
訓 combines 言 (speech, words) with 川, which likely acts as a phonetic component contributing the sound クン. The character expresses teaching or explaining through words.
Words (言) flow like a river (川) of instruction, teaching and explaining as they go.
For クン, imagine a wise raccoon teaching a class: raccoon -> クン, and the raccoon's words flow like a river of instruction.
training; drill; practice; discipline
lesson; precept; teachings; moral
special training; intensive training; crash course
native Japanese reading of a Chinese character
kun reading; kun'yomi; native Japanese reading of a Chinese character
family precepts; family motto; rule of the home
instruction; direction; briefing
instructions sent in response to a question (from an embassy, consulate, etc.)
moral discourse; admonitory lecture; instructive talk; exemplum; apologue
kun'yomi (native Japanese reading of a kanji)
warning; admonition; lesson or a phrase that teaches you not to do something
directive; instructions
school precepts
Reserve Officers' Training Corps (US); ROTC
using the Japanese-reading of kanji to represent native Japanese words (irrespective of the kanji's actual meaning)
marginal notes
joint exercise; joint training
private or secret orders
precepts
guiding motto for one's life