Definitions:
open out (something) so as to extend its surface area, width, or length

extend over a large or increasing area

apply (a substance) to an object or surface in an even layer

lay (a table) for a meal.

the fact or process of spreading over an area

the extent, width, or area covered by something

the range or variety of something

a soft paste that can be applied in a layer to bread or other food

an article or advertisement covering several columns or pages of a newspaper or magazine, especially one on two facing pages

a large and impressively elaborate meal

a bedspread