kf

(Internet slang) Initialism of kill file. [(Internet slang) A user's file listing the users of a newsgroup whose postings are to be ignored, or other criteria for ignoring posts.]

(statistics) Initialism of Kalman filter. [An algorithm that uses a series of measurements observed over time, containing statistical noise and other inaccuracies, and produces estimates of unknown variables that tend to be more precise than those based on a single measurement alone. They are used in navigation, signal processing, etc.]

(Internet) Initialism of Kiwi Farms.

(pharmacology) Initialism of ketotifen fumarate.

(transitive, Internet slang) Initialism of kill file. [(transitive, Internet slang) To add (a user) to a kill file (noun, sense 1).]