Wiktionary
n. 1 (context music English) a minor key with the notes E, F♯, G, A, B, C, and D 2 (context music English) the minor chord with a root of E
Wikipedia
E minor is a minor scale consisting of the pitches E, F, G, A, B, C, and D. Its key signature has one sharp. The E harmonic minor raises the note D to D.
Its relative major is G major, and its parallel major is E major.
Much of the classical guitar repertoire is in E minor, as this is a very natural key for the instrument. In standard tuning (E A D G B E), four of the instrument's six open (un fretted) strings are part of the tonic chord. The key of E minor is also popular in heavy metal music, as its tonic is the lowest note on a standard-tuned guitar.
According to Kenny Ning on Spotify, G major (relative key of E minor) is the most commonly used key in modern music.
Usage examples of "e minor".
Not the voice that spoke to him from out of a whirlwind of scarlet cinnamon-smell in the key of E minor, and whose words were as soft upon his not-flesh as milkweed down.