How to interpret instance_name in Lock Timeouts/sec metric?

Hi, Am trying to get a deeper understanding on locks. I ran this simple query :

SELECT * AS LockTimeoutPerSec

FROM 
    sys.dm_os_performance_counters  
WHERE 
    counter_name = 'Lock Timeouts/sec' 
 

I see a lot of rows being returned, with different values for instance_name field. I referred MSDN doc here http://msdn.microsoft.com/en-us/library/ms190216.aspx, but it doesn't go in-depth on what is the implication of the lock value for each instance name. Atleast, can someone help me by saying which (i.e. corresponding to which instance_name) is the lock value to consider?