letter: 1 a character representing one or more of the sounds used in speech; any of the symbols of an alphabet; 2 a written, typed, or printed communication, esp. one sent in an envelope by mail or messenger
The English language is full of words like this. One word, multiple meanings. Drives me bats!
I also love the "to, too, two" crap we have ensconced ourselves with. And speaking of ensconced…
ensconce: establish or settle (someone) in a comfortable, safe, or secret place
I am settled into my secret place. Woot!