(epigraphy, typography) A misprint (or occasionally a scribal error) that affects a letter.

(programming) A value, as opposed to an identifier, written into the source code of a computer program.

(logic) A propositional variable or the negation of a propositional variable. Wp

Exactly as stated; read or understood without additional interpretation; according to the letter or verbal expression; real; not figurative or metaphorical, and etymonic rather than idiomatic.

Following the letter or exact words; not free; not taking liberties

(theology) (broadly) That which generally assumes that the plainest reading of a given scripture is correct but which allows for metaphor where context indicates it; (specifically) following the historical-grammatical method of biblical interpretation

(uncommon) Consisting of, or expressed by, letters (of an alphabet)

(of a person) Unimaginative; matter-of-fact

(proscribed) Used non-literally as an intensifier; see literally for usage notes.