An apostrophe is the mark ' when it is written to indicate that one or more letters have been left out of a word, as in 'isn't' and 'we'll'. It is also added to nouns to form possessives, as in 'Mike's car'.
英汉词典释义
n.
撇号;省略符号;所有格符号
When do I need to use an apostrophe?什么时候用撇号?Answer these questions, using the words in parentheses. Put the apostrophe in the right place.用句后括号中的词或词组来回答问题,注意撇号的位置。
英英词典释义
Noun
1. address to an absent or imaginary person
2. the mark (') used to indicate the omission of one or more letters from a printed word