What does subprocess mean?
A subprocess is a process that exists within and is controlled by a larger, parent process. In computing, the term describes an operating-system process launched by another program, often to perform a specific supporting task such as running a command, compiling source code, or handling file conversion. The subprocess has its own resources and execution state, but it remains subordinate to the process that created it. This arrangement allows complex programs to divide work among smaller operations while retaining centralized control. More generally, “subprocess” can refer to any secondary stage or activity within a broader procedure, though this use is much less frequent. In technical writing, the distinction between a parent process and its subprocess is important because signals, termination, resource usage, and error handling may be managed separately. The term is especially familiar to programmers and system administrators and conveys the idea of controlled parallelism within a larger operation.
nounA process that runs under the control of, and is usually subordinate to, another process. In computing, it is an operating-system process created by a parent process, such as a command launched by a script.
- A subordinate operating-system process created and controlled by another process.
- A secondary or subordinate process within a larger system or organization.
"The application starts a subprocess to convert the uploaded file while the main interface continues to respond."
"The build script launches a subprocess for each test suite."
"Account verification was handled as a subprocess within the wider approval procedure."
The regular plural adds “-es” to the final s sound.
"The application waits for all background subprocesses to finish before exiting."
A subprocess is a program within a program—a smaller task that can run, fail, or be stopped without necessarily stopping its parent.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does subprocess come from?
“Subprocess” combines the Latin prefix sub-, meaning “under” or “below,” with “process.” “Process” comes from Latin processus, the past participle of procedere, a verb meaning “to go forward.” The compound was formed by applying the idea of subordination to a process, becoming especially common as computing systems adopted the technical concept of a parent process creating subordinate processes.
Related word forms
How subprocess is actually used
The word is most common in computing and systems administration. Outside technical contexts, its broader sense of a subordinate process is understandable but relatively uncommon.
Easily confused with subprocess
A process is any independently executing program or sequence of operations, whereas a subprocess is specifically one created within and subordinate to another process.