A power of attorney document.

Alternative spelling of belles-lettres

(obsolete) The humanities. / (archaic) Literature, particularly light compositions valued for their aesthetic properties. / (archaic) Literary studies, particularly literary aesthetics.

A short, hand-written communication to thank someone who has recently provided the writer with hospitality, usually dinner or an overnight visit.

(finance) A letter that is not legally binding but provides some form of assurance about the financial position of an entity.

A letter addressed to one person, or more, but published (as for example in a newspaper) for the public to read.

plural of letter of recommendation

A letter written by one person who is familiar with another, usually a teacher, employer, or person of similar authority, evaluating and often extolling the fitness of the other person for a position.

Particularly significant or positive.

plural of letter of credit