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The term that describes a lock featuring both a latch and a deadbolt with multiple functions is double locking. This type of lock provides enhanced security by utilizing two different mechanisms: one working with a latch and the other with a deadbolt. The latch allows for ease of entry while the deadbolt adds an extra level of protection when secured, making it harder for unauthorized access.

In the context of the locking mechanisms, the combination helps to deter potential break-ins. Although terms like multi-functional lock and triple locking may seem plausible, they do not specifically convey the functionality of having both a latch and a deadbolt working together in this security manner. A multi-functional lock typically refers to locks with various operational modes rather than specifically having both latch and deadbolt features. Meanwhile, triple locking does not accurately describe the standard lock mechanisms commonly utilized in this context and could misrepresent the typical configuration of such locks.