A non- re-entrant piece of code that can only be executed by one process at a time. It will usually terminate in bounded time and a process will only have to wait a bounded time to enter it. Some synchronisation mechanism is required at the entry and exit of the critical section to ensure exclusive use.
CRITICAL SECTION
Meaning of CRITICAL SECTION in English
FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012