(film, of lighting) Gently highlighting; low-key.

The unpublished key in asymmetric cryptography.

plural of public key

(computing, databases) In the design of a database table, the primary key (abbreviated PK) is selected among the non-empty set of candidate keys. The PK is a column (or an irreducible group of columns) able to identify every row of the table.

A can opener having a triangular tip that pierces the can. / Used other than figuratively or idiomatically: see church, key.

(music) An indication of the key of a composition, giving the number of sharps or flats in the corresponding scale.

(computing) To take something as a controlling input datum. / To turn off something (e.g. a car) using a key.

(music) Pitched inaccurately either above or below the correct note. / (by extension) Not harmonious, or out of accord.

With inaccurate pitch.

plural of dichotomous key