from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The confinement of prison inmates to their cells as a security measure following a disturbance in the prison.
- n. A prison, especially a high-security one.
- n. A device that secures a piece of equipment, especially a computer, so that it cannot be moved or stolen.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The confinement of people in their own rooms (or cells) as a security measure after a disturbance
- n. A contrivance to fasten logs together in rafting.
From lock + down (Wiktionary)