/sev"euhnth/ , adj.
1. next after the sixth; being the ordinal number for seven.
2. being one of seven equal parts.
n.
3. a seventh part, esp. of one ( 1 / 7 ).
4. the seventh member of a series.
5. Music.
a. a tone on the seventh degree from a given tone (counted as the first).
b. the interval between such tones.
c. the harmonic combination of such tones.
[ bef. 950; ME; see SEVEN, -TH 2 ; r. ME sevethe, OE seofotha ]