Definitions:

1. A low-level programming language that consists of binary or hexadecimal instructions that a computer's central processing unit can directly understand and execute. NOUN
   • Machine code is hard to read and write because it consists of binary instructions that directly control the hardware.
2. A set of instructions coded so that te computer can use it directly without further translation. NOUN
   • In the early days of computing, programmers had to write software directly in machine code for the computer to understand their instructions.
3. System of instructions and data directly undestandable by a computer's central processing unit. NOUN
   • The software compiler converts high-level code into machine code so that the processor can execute it.

Synonyms:

• binary code
• low-level language
• machine language
• operating system code