The act of typing at a keyboard (with or without a mouse or other pointing device)

(music) The note on which a musical key is based; the tonic. / The main theme of a speech, a written work, or a conference.

(transitive) To deliver a speech that sets the main theme of a conference or other gathering.

Someone who plays a keyboard.

(cryptography) Any word used as the key to a code. / (information science) Any word used in a reference work to link to other words or other information.

(transitive) To tag with keywords, as for example to facilitate searching.

(computing) A key, or more usually a combination of keys, on the keyboard of a personal computer that activates a specific, predefined function.

(baseball) Second base, because it is often the key to scoring and defense.

Someone who keyboards; a typist. / Synonym of keyboardist

On an automobile, a remote control device used to lock and unlock a vehicle's doors, open the trunk and sound the alarm system.