A piston is most commonly a part of a machine that moves back and forth inside a cylindera tube-shaped chamber where a piston slides. It is also the surnamea family name shared by members of the same family of an American composera person who writes music, Walter Piston.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Pronunciation
AI-generated pronunciation audio (OpenAI).
Accent: General American English
IPA: /PIS-tən/
Easy pronunciation: PIS-tən (approximate spelling).
Stress: Stress on the first syllable.
Mechanical noun: a moving part in an engine, pump, or similar machine.
Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Piston Meaning
a part in a machine that moves back and forth to push or pull something
Part of speech: noun
Definition: A moving part in an engine, pump, or similar machine that slides or pushes back and forth inside a cylinder.
Example: The engine uses a piston to turn fuel power into motion.
Synonyms for this meaning:
- plunger — A close substitute in some mechanical contexts, though not always interchangeable with piston.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Other Meanings of Piston
Meaning 2
the name of an American composer
Part of speech: noun
Definition: The surname of Walter Piston, a United States neoclassical composer (1894-1976).
Example: Walter Piston wrote orchestral and chamber music.
Synonyms for this meaning:
- walter piston — Name form for the composer sense.
Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Piston Synonyms
Similar Meaning
- plunger
the surname of Walter Piston, the composer
- walter piston
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Common Mistakes
- People sometimes mix up piston with plunger, but plunger is only a partial synonym and depends on the machine context.
- The composer sense is a proper name, not the mechanical part.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.
Frequently Asked Questions
What does piston mean?
Piston usually means a moving part in a machine or engine that slides back and forth inside a cylinder. It can also refer to the composer Walter Piston.
What are the synonyms of piston?
For the mechanical sense, the closest synonym in the supplied data is plunger, though it is not a perfect match in every context. For the composer sense, the name form Walter Piston is the relevant term.
Is piston always a machine part?
No. It most often refers to a machine part, but it is also a surname, as in Walter Piston, the composer.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-14. AI assessment; not a guarantee of accuracy.