Wiktionary
n. (context computing English) The set of machine instructions that a particular CPU can execute; the corresponding set of assembly language mnemonics.
Wikipedia
An instruction set, or instruction set architecture (ISA), is the part of the computer architecture related to programming, including the native data types, instructions, registers, addressing modes, memory architecture, interrupt and exception handling, and external I/O. An ISA includes a specification of the set of opcodes ( machine language), and the native commands implemented by a particular processor.
Usage examples of "instruction set".
Its last instruction set lay uppermost, ready to execute if anyone turned on the power, but hard vacuum and random radiation had changed a few bits here and there.
Cory'd found the instruction set that'd eluded Daniel a moment previously, but he'd applied it a touch too generally.
It's all very localized and very general, and often not very logical, but I am compelled by my operating system instruction set to furnish the slight programs needed.
You see instead a slot that is waiting for this RISC, a reduced instruction set chip with tons of RAM--random access memory--and plenty of PROM--programmed read only memory--for start-up and function.
The rules of magic were about as regular as the instruction set on a Z80.
Instead, by this subtle but significant tweaking of their own bodies' instruction set, they became what they might have become anyway had some bizarre shiftings in their environment and circumstances so decreed.
Any means of passing and storing an instruction set for a life-form.
If we were computers, Joe Lee would have a different main processor chip, with a different instruction set.