locked
v.v. fixed in one position or state so that it cannot be changed or moved. You use this to describe something that is securely closed or a computer file that you cannot edit.
v. secured by a locking mechanism or otherwise rendered immobile or unalterable. In a computing context, it refers to a file, record, or device that is inaccessible for modification due to being in use by another process.
The door is locked so you cannot go inside.
I cannot save the changes to this spreadsheet because the file is currently locked by another user.
The system administrator confirmed that the account was locked after three failed login attempts to prevent a potential brute-force attack on the server.
* (drunk): Perhaps from airlocked.
Often used as a predicative adjective after 'is' or 'remains'. In computing, it frequently describes files or database records.