After he twice walked in on me having a bath, we fitted a lock.
Times, Sunday Times (2012)
New locks are fitted for security.
Times, Sunday Times (2008)
They fittedlocks on the fridge and larder.
The Sun (2010)
Definition of 'lock'
lock
(lɒk)Explore 'lock' in the dictionary
countable noun
The lock on something such as a door or a drawer is the device which is used to keep it shut and prevent other people from opening it. Locks are opened with a key.
Definition of 'fit'
fit
(fɪt)Explore 'fit' in the dictionary
verb
If you fit something somewhere, you attach it there, or put it there carefully and securely.