an

A 开头单词专八核心词词源字典

柯林斯词典

an /ən, æn/

1. DET An is used instead of "a," the indefinite article, in front of words that begin with vowel sounds. 代替不定冠詞(a)，用在元音字母開頭的詞之前
2. CONJ →an obsolete or dialect word for if
3. the INTERNET DOMAIN NAME for Netherlands Antilles 荷屬安的列斯群島

剑桥词典

He applied to become an American citizen .
Chris has an evening job as an office cleaner .
That was an excellent meal !
There's been an accident - dial 999 and ask for an ambulance .
Let the fish cook for half an hour before you add the wine .