Definition of "love letter"
A letter written about the author's love for the intended reader.
Quotations
Thus, when he drew up instructions in lawyer language […] ; his clerks, however, understood him very well. If he had written a love letter, or a farce, or a ballade, or a story, no one, either clerks, or friends, or compositors, would have understood anything but a word here and a word there. For his signature, however, that was different.
1892, Walter Besant, “Prologue: Who is Edmund Gray?”, in The Ivory Gate […], New York, N.Y.: Harper & Brothers, […]