N-COUNT 撇号,省字号,所有格符号(符号为’) 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'. 撇号,省字号,所有格符号(符号为’)