ninth
ninth Lexical Profile
ninth Game Scores & Validity
• adjective
Constituting number nine in a sequence; coming immediately after the eighth in order or position.
"Their offices are located on the ninth floor of the downtown building."
Each of nine equal parts into which something is or may be divided.
"Each heir was entitled to a ninth share of the estate."
• noun
A person or thing occupying the position number nine in a sequence or ranking.
"The annual conference will be held on the ninth of November."
One of nine equal parts into which a whole is divided.
"Roughly one ninth of the survey participants left the question blank."
A musical interval spanning an octave plus a second, or the ninth note of an extended scale.
"The pianist enriched the jazz harmony by adding a dominant ninth to the chord."
• adverb
In the ninth place or position in a sequence or list.
"The marathon runner finished ninth overall in the championship race."
Word Nuance & Usage
Unlike 'nine' and 'ninety', 'ninth' drops the 'e' before adding the ordinal suffix '-th', making 'nineth' a common misspelling.
Word Origin & Etymology
From Middle English ninthe, derived from Old English nigoþa, from Proto-Germanic *niwundô, an ordinal formation from the root of nine.