Built-in (adjective)

1. Made as a permanent part of a structure or device.
2. Constructed or integrated into the design of something else.
3. Incorporated as a standard or essential feature.

Origin:

The term "built-in" originated in the late 19th century and is a combination of the words "built" and "in". it refers to something that is made as a permanent part of a structure or device.

Examples:

1. The kitchen has a built-in oven and microwave.
2. The tablet has a built-in keyboard for typing.
3. The TV stand has a built-in storage for DVDs.
4. The software has a built-in spell checker.
5. The car has a built-in GPS system.