Real Dictionary

silhouette
countable noun: A silhouette is the solid dark shape that you see when someone or something has a bright light or pale background behind them.
countable noun: The silhouette of something is the outline that it has, which often helps you to recognize it.

silhouette in American English
an outline, esp. a profile portrait, made either by cutting from black paper and fixing on a light background, or by drawing and then filling in with a solid color
to show or project in silhouette
noun: a two-dimensional representation of the outline of an object, as a cutout or configurational drawing, uniformly filled in with black, esp. a black-paper, miniature cutout of the outlines of a famous person's face
transitive verb: to show in or as if in a silhouette

silhouette in British English
noun: the outline of a solid figure as cast by its shadow
verb: to cause to appear in silhouette