What does deform mean?
To deform is to alter something's shape so that it becomes distorted, warped, or no longer has its natural or intended form. The verb applies both to objects and living bodies: heat can deform a metal beam, sustained pressure can deform a plastic component, and disease or injury can deform bones or joints. It is most at home in technical registers — engineering, materials science, medicine — where it describes measurable changes in structure, but it also appears in general writing whenever something visibly loses its proper shape. Unlike 'damage', which suggests any kind of harm, deform specifically concerns form and geometry, and unlike 'disfigure', it does not necessarily imply ugliness so much as deviation from a norm. Derived forms include the noun 'deformation', the adjective 'deformed', and the noun 'deformity'.
verbTo distort or spoil the normal shape or form of something, especially permanently or visibly; to make misshapen.
- To change or spoil the natural shape of something, making it misshapen, especially in a lasting way.
"The intense heat had begun to deform the metal frame."
"Years of stress caused the bridge's steel supports to deform slightly out of true."
"The disease can deform the joints if left untreated."
Every word built on Latin 'forma' — from 'deform' to 'transform' to 'uniform' — carries a tiny ancient idea of shape inside it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of deform
Deform comes from the Latin verb deformare, formed from de- ('away, down') plus formare ('to form, shape'), itself derived from forma ('shape, figure'). It entered English via Old French in the late Middle Ages, originally carrying the sense of spoiling beauty as well as shape. It belongs to a large family of English words borrowed from or built on the same root, including conform, transform, reform, inform, and uniform.
Related word forms
How deform is actually used
Mostly formal or technical, common in engineering, materials science, and medicine; in everyday speech about people, 'disfigure' often carries stronger emotional weight, while 'deform' tends toward physical or structural description.
Easily confused with deform
To defame is to damage someone's reputation through false statements, whereas to deform is to physically alter or spoil a shape or form.