ninth

The word “ninth” means coming after eight others in a sequence; 9th. In plain terms, ordinal form of nine — 9th in order, or a ninth part, or a musical interval.

“Ninth” is pronounced nynth (/naɪnθ/ in IPA).

Here is “ninth” used in a sentence: “This is the ninth time he has asked the same question.”

Depending on how it is used, “ninth” can be an adjective and a noun.

The word “ninth” comes from Old English. From Old English niġoþa, from nine + the ordinal ending -th.

“Ninth” is a fairly common word in modern English.

“Ninth” has 3 distinct senses listed in this dictionary. The most common is: coming after eight others in a sequence; 9th.

The correct spelling is ninth: nine drops its final e before the -th ending. 'Nineth' is a common misspelling. Note that nineteenth keeps the e because it is formed from nineteen, not directly from nine.

In music, a ninth is the interval spanning nine notes of the scale — an octave plus one step, as from C up to the D above the next octave. Chords extended to include this note are called ninth chords.

A ninth is one of nine equal parts of something — the fraction 1/9, or about 11.1 percent. For example, if nine people split a bill equally, each pays a ninth of the total.

Ninth and 9th are the same word; 9th simply uses a numeral. Most style guides prefer the spelled-out form in running text ('the ninth chapter') and the numeral form in dates, addresses, rankings, and tables. Whichever you choose, keep it consistent within a document.