In 23.08 ES, 23.07 ES, 10.6 ES, 10.6 CS, 10.5 ES, 10.5 CS:
A description for this Status Variable has not yet been added to this Documentation.
In 10.4 ES, 10.4 CS, 10.3 ES, 10.3 CS, 10.2 ES:
In 10.2 CS:
Total number of InnoDB deadlocks. Deadlocks occur when at least two transactions are waiting for the other to finish, creating a circular dependency. InnoDB usually detects these quickly, returning an error. XtraDB only.
Additional information on this topic may be found in the MariaDB Public Knowledge Base.