A vertical bar between the panes of glass or casements of a window or the panels of a screen.
To shape into divisions by means of mullions.
A panel on the front page of a newspaper outlining some of the features to be found inside.
The horizontal silhouette of a city or building against the sky.
The line at which the earth and sky meet.
A path of movement, especially military movement, producing a silhouette above terrain features visible from the location of likely observers.
To filter by means of the skyline operator.
To outline something against the sky.