ninth

• 形容词，表示序列中的第九个；位于第八个之后、第十个之前。

An adjective referring to the number nine in a sequence; coming after the eighth and before the tenth.

1. Position in sequenceA2formal

   Coming immediately after the eighth and before the tenth in a series or order.

   第九

   • He finished in ninth place in the race.
   • The ninth chapter of the book is the most exciting.
   • She lives on the ninth floor of the apartment building.

• 表示排在第八之后的位置或等级，或将整体分成九等份中的一份。

A noun referring to the position or rank that comes after the eighth, or one of nine equal parts of a whole.

1. Position in a seriesA2formal

   The item or person that occupies the number nine position in a sequence.

   第九

   • He was the ninth to finish the race.
   • The ninth chapter of the book is the most exciting.
   • She came in ninth in the competition.

2. FractionB1formal

   One of nine equal parts of a whole.

   九分之一

   • He inherited a ninth of the estate.
   • The recipe calls for a ninth of a cup of sugar.
   • Only a ninth of the population lives in that region.

• 基数词，表示数量九，用于计数九个物品、人或单位；也可作名词、量词或代词使用。

The cardinal numeral representing the quantity of nine units; the ninth positive integer following eight; the highest single-digit number in the decimal system; a perfect square (3²) with unique mathematical properties. Also functions as a noun (denoting the symbol, quantity, or group of nine), adjective/determiner (modifying nouns to indicate quantity), and pronoun (standing in for a plural noun phrase).

1. Cardinal numeral: the number 9A1formal

   Used to denote a quantity of nine persons or things; the ninth positive integer in the sequence of natural numbers; the highest single-digit number in base-10 notation; a perfect square (3×3) with unique properties in numerology and mathematics; represents a nonet, ninefold quantity in counting and everyday usage.

   基数词：数字9

   • There are nine innings in a standard baseball game.
   • She saved nine coins for the vending machine.
   • Nine plus nine equals eighteen.
   • They traveled for nine months across Asia.
   • He caught nine fish during the tournament.

2. Noun: the number, symbol, or group of nineA2formal

   A noun referring to the cardinal number nine; the numeral symbol 9 or IX; a set, collection, or group consisting of nine items; a playing card, domino, or die face displaying nine pips; a team, ensemble, or musical group of nine members (nonet); in sports, refers to a baseball team or cricket batting order position.

   名词：数字、符号或九个一组

   • The number nine holds symbolic meaning in many cultures.
   • Circle all the nines in this data set.
   • The string nonet performed at the concert hall.
   • He played the nine of diamonds to win the hand.
   • In baseball, the starting nine take the field.

3. Adjective/Determiner: amounting to nineA1formal

   Used attributively before a noun to indicate that the quantity or number of the noun is nine; modifies plural countable nouns to specify exact quantity.

   数量为九的

   • They stayed in a nine-story hotel.
   • We need nine volunteers for the community event.
   • The recipe requires nine cloves of garlic.
   • She completed nine triathlons last season.
   • Nine research institutions collaborated on the study.

4. Pronoun: nine people or things (plural)B1formal

   Used as a pronoun to refer to nine previously mentioned or understood persons or things; takes plural verb agreement.

   代词：九个，九个人或事物

   • Thirty applied, but only nine were selected for the program.
   • I invited twenty-five guests; nine could not attend.
   • How many participants do you expect? — Nine should be ideal.
   • Several teams entered the competition, but nine reached the playoffs.
   • Of the manuscripts submitted, nine were accepted for publication.