four

• 数词，表示数量三加一，即4；不是形容词。

The cardinal number equivalent to 3 plus 1; not an adjective.

1. Number fourA1formal

   Being one more than three in quantity or value.

   四

   • There are four seasons in a year.
   • She has four brothers and sisters.
   • The meeting will start at four o'clock.

• 数词，表示三加一所得的基数，即数字4；也指显示四个点的扑克牌、多米诺骨牌或骰子。

A noun referring to the cardinal number that is the sum of three and one, or a playing card, domino, or die whose upward face shows four pips.

1. The number 4A1formal

   The cardinal number that is the sum of three and one.

   四

   • There are four seasons in a year.
   • She has four brothers and sisters.
   • The meeting is scheduled for four o'clock.

2. Playing card or diceA2formal

   A playing card, domino, or die that has four spots or pips on its face.

   四点

   • He drew a four from the deck of cards.
   • The die showed a four after the roll.
   • In dominoes, a four is a common tile.

   同义词caterfour-spot

• 数词，表示数量四；也可作名词、量词或代词使用。

The cardinal numeral representing the quantity of four units; the fourth positive integer following three; the first composite number that is also a perfect square (2²). Also functions as a noun (denoting the symbol, quantity, or group of four), adjective/determiner (modifying nouns to indicate quantity), and pronoun (standing in for a plural noun phrase).

1. Cardinal numeral: the number 4A1formal

   Used to denote a quantity of four persons or things; the fourth positive integer in the sequence of natural numbers; the first composite number that is also a perfect square (2×2); represents a quartet, quadruplet, or quadruple quantity in counting, mathematics, and everyday usage.

   基数词：数字4

   • I have four children.
   • She bought four tickets for the concert.
   • Four plus four equals eight.
   • They arrived four days early.
   • He scored four touchdowns in the season.

2. Noun: the number, symbol, or group of fourA2formal

   A noun referring to the cardinal number four; the numeral symbol 4 or IV; a set, collection, or group consisting of four items; a playing card, domino, or die face displaying four pips; a team or ensemble of four members.

   名词：数字四、符号四或四的组合

   • The number four is considered lucky in some cultures.
   • Write the answer as a four, not a nine.
   • They formed a four to play bridge.
   • She drew the four of spades from the deck.
   • In rowing, a four is a boat with four oarsmen.

3. Adjective/Determiner: amounting to fourA1formal

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

   数量词/形容词：四个

   • They live in a four-story building.
   • We need four volunteers for the task.
   • The recipe requires four tablespoons of sugar.
   • She worked four consecutive nights.
   • Four nations participated in the summit.

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

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

   代词：四个（人或事物）

   • Eight applied, but only four were selected.
   • I invited twelve guests; four arrived on time.
   • How many do you need? — Four will be enough.
   • Several candidates interviewed, but four advanced.
   • Of the proposals, four were approved.