Lettered is an old, rather bookish way to say that someone is well educated — they have read a lot and they know learning and books.

Lettered是 is an old, rather bookish way to say that someone is well educated是一種老式、有點書卷氣的說法，表示一個人受過良好教育 — they他們 have read a lot讀過很多書 and they know learning and books也懂學問和書本。

You meet it in older writing: “a lettered man” means a learned person, not someone who writes a lot of posted letters. Behind it sits an older sense of letters meaning education, the way we still say “a person of letters” for a writer or scholar.

You你 meet it in older writing會在比較舊的文章裡遇到它: 「a lettered man」 means a learned person a lettered man指的是有學問的人, not someone who writes a lot of posted letters不是指常常寫信寄信的人。Behind it在它背後 sits an older sense of letters meaning education藏著letters（文字）以前指「學問」的舊用法, the way就像 we still say 「a person of letters」 for a writer or scholar我們現在還說a person of letters來指作家或學者。

Today the word feels literary and a little stiff; in everyday talk we would say well educated, well read, or learned. The same spelling is also used for something marked with alphabet letters, like a lettered jacket — that is a different use, and not this one.

Today今天 the word這個字 feels literary and a little stiff給人文謅謅、有點生硬的感覺; in everyday talk在日常說法裡 we would say well educated, well read, or learned我們會說well educated、well read、或learned。The same spelling同樣的拼法 is also used for something marked with alphabet letters也用來指印有字母的東西, like a lettered jacket像lettered jacket（印字的外套） — that是 is a different use, and not this one是另一個用法，不是這個意思。