(retronym, linguistics) Any human language that has evolved naturally in a community, usually in contrast to computer programming languages, to controlled natural languages, and to constructed languages such as Esperanto (although constructed languages are subject to change by natural forces among fluent speakers).

Timing sexual intercourse to avoid the time of ovulation (if pregnancy is not wanted) or to fall within that time (if pregnancy is desired).

(Canada, politics, slang) The Liberal Party of Canada (LPC).

plural of natural language understanding

hydrocarbons heavier than methane harvested from natural gas wells, generally, ethane, propane, butanes, pentanes.

A subtopic of natural language processing in artificial intelligence that deals with machine reading comprehension.

A field of computer science and linguistics concerned with the interactions between computers and human (natural) languages, especially computational analysis and processing of large amounts of natural language data.

(music) A type of minor scale with the 3rd, 6th, and 7th notes lowered by one semitone, with the interval pattern:

(computing) A user interface for a computer that is effectively invisible, or becomes invisible to its users with successive learned interactions.

plural of natural user interface