IdiomDaily LifeEnglish

letter perfect

Meaning: Exactly right.

Example: “By opening night, her lines were letter perfect.”

Origin: Comes from the theater, where an actor who is letter perfect has the part exactly as written — every word in place, nothing approximated, nothing improvised to cover a gap. Behind it sits the older English phrase "to the letter," translating the Latin ad litteram and meaning compliance so exact that it follows the written characters themselves rather than the sense they convey. That exactness has always carried a faint ambivalence in English, because the same tradition supplies the warning that the letter kills while the spirit gives life. Letter perfect is unambiguous praise for a performer, who is supposed to deliver what was written; applied to anything requiring judgment it can shade into a criticism, describing someone who has the words right and nothing else.

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