A processor event attributable to instruction execution, such as a page fault during a memory access or a divide exception on x86. This causal connection distinguishes it from the asynchronous device interrupts discussed here. It also differs from a programming language's exception handling, which specifies how program-level exceptions propagate. [ref]
https://docs.kernel.org/arch/x86/entry_64.html. Linux kernel documentation, Kernel Entries: architecturally defined exceptions
An exception presented with architectural state corresponding to a program-order boundary: older instructions have taken effect and younger ones have not. Private results in a reorder buffer can be discarded to recover this state.
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