What does extrude mean?
To extrude is to force something out or through an opening by pressure, most commonly in manufacturing contexts where a softened material — plastic, aluminum, clay, dough — is pushed through a shaped opening called a die to produce long objects with a continuous profile. Pipes, window frames, spaghetti, and bricks are all familiar products of extrusion, making this one of the foundational processes of modern industry. Beyond the workshop, the verb appears in science and everyday description: a snail may extrude slime, and a geologist might describe lava being extruded from a volcano. The word carries a mechanical, deliberate connotation — something is being pushed out under controlled force rather than emerging naturally. It derives from Latin trudere, 'to thrust,' sharing that energetic root with words like intrude and protrude. Useful whenever precision matters, extrude describes active outward shaping rather than mere presence.
verbTo force or push something out or through an opening, especially by pressure; in manufacturing, to shape a material such as plastic or metal by forcing it through a die of a desired cross-section.
- (transitive) To force, press, or push something out through a small opening or aperture.
- (manufacturing) To shape a heated or softened material — such as plastic, metal, or clay — by forcing it through a die to give it a continuous cross-sectional profile.
- (intransitive) To protrude; to stick out from a surface or body.
"The factory extrudes molten aluminum into long, hollow tubes."
"The nozzle extrudes a thin ribbon of melted chocolate onto each cookie."
"Rounded ridges of lava extruded slowly from the fissure over several days."
Every plastic straw, pasta shape, and brick you've ever used was likely born the same way — squeezed through a die like icing through a piping bag.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of extrude
Extrude comes from the Latin extrudere, formed from ex- ('out') plus trudere ('to thrust, push'). The English verb appeared in the early seventeenth century, initially with the general sense of forcing or expelling something out before narrowing toward its modern technical uses. It shares its Latin root with cognates including intrude, protrude, and obtrude, which likewise describe different directions of thrusting.
Related word forms
How extrude is actually used
Primarily a technical and scientific term, common in engineering, manufacturing, dentistry, and geology. The intransitive sense meaning simply 'to protrude' is more literary and less frequent. The verb is regular, forming 'extruded' and 'extruding'.
Easily confused with extrude
Intrude means to enter or impose oneself uninvited, while extrude means to push or force something outward.
Protrude describes something sticking out on its own or as a state, whereas extrude emphasizes the act of actively forcing material out.