From the American Heritage Dictionary

transform (trans-fôrm2) v. transformed, transforming, transforms.

-tr.

1. To change markedly the appearance or form of: "A thick, fibrous fog had transformed the trees into ghosts and the streetlights into soft, haloed moons" (David Michael Kaplan).
2. To change the nature, function, or condition of; convert. See Synonyms at convert.
3. Mathematics. To subject to a transformation.
4. Linguistics. To subject (a construction) to a transformation.
5. Electricity. To subject to the action of a transformer.
6. Genetics. To subject (a bacterial cell) to transformation.

-intr.
1. To undergo a transformation.

-transform (trans2fôrm1) n.

The result, especially a mathematical quantity or linguistic construction, of a transformation. [Middle English transformen, from Old French transformer, from Latin trEnsfÅrmEre : trEns-, trans- + fÅrma, form.] -trans0form2a0ble adj.

Verb: To bring about a radical change in. revolutionize, metamorphose.

Verb: To change into a different form, substance, or state. transfer, translate, convert, commute, transpose, transmute, metamorphose, mutate, transfigure, transmogrify, transubstantiate.