built-in vs foreign

built-in

noun
  • Anything (such as a piece of furniture, or a software feature) that is built in, not added as an extra. 

adj
  • Being an essential and permanent part of something. 

  • Being an included feature that normally comes as an extra. 

  • Constructed as a non-detachable part of a larger structure. 

foreign

noun
  • An area of a community that lies outside the legal town or parish limits. 

  • A foreigner: a person from another country. 

  • A foreign whip, a car produced abroad. 

adj
  • Alien; strange. 

  • Relating to a different nation. 

  • Not characteristic of or naturally taken in by an organism or system. 

  • Located outside a country or place, especially one's own. 

  • From a different one of the states of the United States, as of a state of residence or incorporation. 

  • Belonging to a different organization, company etc. 

  • Originating from, characteristic of, belonging to, or being a citizen of a country or place other than the one under discussion. 

How often have the words built-in and foreign occurred in a corpus of books? (source: Google Ngram Viewer )