| 1. | the row or set of keys on a piano, organ, or the like. |
| 2. | a set of keys, usually arranged in tiers, for operating a typewriter, typesetting machine, computer terminal, or the like. |
| 3. | any of various musical instruments played by means of a pianolike keyboard, as a piano, electric piano, or organ. |
| 4. | Also, key, key in. Computers. to enter (information) into a computer by means of a keyboard. |
| 5. | to set (text) in type, using a machine that is operated by a keyboard. |