n.[C]

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

   他上月给我写来一封信。

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

   英语字母有二十六个。

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

   他遵守法律的字面条文，而不是其精神实质。

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

   他学的是医但毕生从事文学。

5. 证书，许可证[P1]

vt.

1. 在……上写字母；用字母写
   The word "exit" was lettered on the door.

   “出口”两字写在门上。

vi.

1. 写上字母

n.

1. a character representing one or more of the sounds used in speech; any of the symbols of an alphabet.
   ▸US a school or college initial as a mark of proficiency, especially in sport.
2. a written, typed, or printed communication, sent by post or messenger.
3. the precise terms of a statement or requirement:
   adherence to the letter of the law.
4. (letters) literature.
   ▸archaic erudition.
5. Printing  a style of typeface.

v.

1. inscribe or provide with letters.
2. US informal be awarded a letter as a mark of proficiency in sport.