I. ˈ ̷ ̷| ̷ ̷ adjective
1. : forming an integral part of a structure
a built-in range finder
especially of furnishings : constructed as or in a recess in a wall
I want built-in bookcases next to the fireplace
2. : present by reason of the nature or makeup of some other relevant matter : inherent , constitutional
the built-in safeguards that our constitution provides against tyranny
release of the atom's built-in energy — Stuart Chase
II. ˈ ̷ ̷ˌ ̷ ̷ noun
( -s )
Etymology: built-in (I)
: a piece of built-in furniture