To recreate the original source code from a compiled executable.(verb)
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Use "decompile" in a sentence
"The "Terms of Agreement" that Bob Collins, an employee of MPR, agreed to specifically states that you may not "decompile" this software, yet Collins asks on his blog "Anybody got a good decompiler?""
""decompile" it in order to make their program "interoperable," or simply better."
"I reflected so much that I was able to decompile my own operating system."