A slope or bevel, especially of the sides of a door or window, by which the opening is made larged at one face of the wall than at the other, or larger at each of the faces than it is between them.
source: Webster 1913
noun
an outward bevel around a door or window that makes it seem larger
source: WordNet 3.0
adjective satellite
turned outward in an ungainly manner
Splay knees.
source: WordNet 3.0
verb
spread open or apart
He splayed his huge hands over the table.
source: WordNet 3.0
turn outward
These birds can splay out their toes. Ballet dancers can rotate their legs out by 90 degrees.
source: WordNet 3.0
move out of position
Dislocate joints. The artificial hip joint luxated and had to be put back surgically.