twenty-one
twenty-one — noun
1. the number that comes after twenty and before twenty-two, written in digits as 2
the number that comes after twenty and before twenty-two, written in digits as 21
Mei turned twenty-one last week and celebrated with her family at a restaurant.
The teacher asked the class to count from one to twenty-one out loud.
counting sequence: from X to Y
There are twenty-one students in Tariq's English class this semester.
Constanza wrote the number twenty-one on the board and drew a circle around it.
Ezra solved the maths problem and found that twenty-one was the answer.
- 21
the Arabic numeral form of the same number
用法筆記
Twenty-one is written with a hyphen between 'twenty' and 'one'. It can be used as a determiner before a plural noun (twenty-one students) or alone as a number.
常見錯誤
2. a card game in which each player tries to get card values adding up to 21, or cl
a card game in which each player tries to get card values adding up to 21, or close to it, without going over, and to have a higher total than the dealer
Abigail learned to play twenty-one from her grandmother during the summer break.
A group of friends played twenty-one with a worn deck of cards at the party.
collocation: play twenty-one
Tariq won three rounds of twenty-one in a row and everyone at the table cheered.
Lakshmi explained the rules of twenty-one to the new players before the game began.
The casino table for twenty-one had five people sitting around it, trying their luck.
用法筆記
This card game is also widely called 'blackjack', especially in casinos and in North America. 'Twenty-one' is more common in informal, social settings outside casinos.