NINTH
ninth, th
(adjective) coming next after the eighth and just before the tenth in position
ninth, one-ninth
(noun) one part in nine equal parts
ninth
(noun) position nine in a countable series of things; “going into the ninth they were a run ahead”
Source: WordNet® 3.1
Etymology
Adjective
ninth (not comparable)
The ordinal form of the number nine.
Synonyms
• 9th, IXth, (in names of monarchs and popes) IX
Noun
ninth (plural ninths)
The person or thing in the ninth position.
One of nine equal parts of a whole.
(music) The compound interval between any tone and the tone represented on the ninth degree of the staff above it, as between one of the scale and two of the octave above; the octave of the second, consisting of 13 or 14 semitones (called minor and major ninth).
Verb
ninth (third-person singular simple present ninths, present participle ninthing, simple past and past participle ninthed)
to lose a ninth
to divide by nine
Source: Wiktionary
Ninth, a. Etym: [From Nine; cf. AS. nigoedha.]
1. Following the eight and preceding the tenth; coming after eight
others.
2. Constituting or being one of nine equal parts into which anything
is divided.
Ninth, n.
1. The quotient of one divided by nine; one of nine equal parts of a
thing; the next after the eighth.
2. (Mus.)
(a) An interval containing an octave and a second.
(b) A chord of the dominant seventh with the ninth added.
Source: Webster’s Unabridged Dictionary 1913 Edition