Real Dictionary

vignette
countable noun: A vignette is a short description, picture, or piece of acting which expresses very clearly and neatly the typical characteristics of the thing that it represents.

vignette in American English
an ornamental design (originally one of vine leaves, tendrils, and grapes) or illustration used on a page of a book, magazine, etc., as at the beginning or end of a chapter or section
to make a vignette of
noun: a decorative design or small illustration used on the title page of a book or at the beginning or end of a chapter
transitive verb: to finish (a picture, photograph, etc.) in the manner of a vignette

vignette in British English
to finish (a photograph, picture, etc) with a fading border in the form of a vignette
noun: a small illustration placed at the beginning or end of a book or chapter