(eighth), a musical term found in the title of (Psalms 6:1) A similar direction is found in the title of (Psalms 12:1) Comp. 1Chr 15:21 It seems most probable that Sheminith denotes a certain air known as the eighth, or a certain key in which the psalm was to be sung.
SHEMINITH
Meaning of SHEMINITH in English
Smith's Bible English dictionary. Английский библейский словарь Смита. 2012