letter

n.[C]

1. 信，函件
   He wrote me a letter last month.

   他上月給我寫來一封信。

2. 字母；文字
   There are 26 letters in the English alphabet.

   英語字母有二十六個。

3. （法律等的）字面意義[the S]
   He kept the letter of the law but not the spirit.

   他遵守法律的字面條文，而不是其精神實質。

4. 文字；學問[P]
   He was trained as a doctor but devoted his life to letters.

   他學的是醫但畢生從事文學。

5. 證書，許可證[P1]