1. a thorough or dramatic change in form or appearance: "its landscape has undergone a radical transformation"
▪ a metamorphosis during the life cycle of an animal.
▪ the induced or spontaneous change of one element into another by a nuclear process.
▪ a process by which one figure, expression, or function is converted into another that is equivalent in some important respect but is differently expressed or represented.
▪ a process by which an element in the underlying deep structure of a sentence is converted to an element in the surface structure.
▪ the genetic alteration of a cell by introduction of extraneous DNA, especially by a plasmid.
▪ the heritable modification of a cell from its normal state to a malignant state.
Word Originlate Middle English: from Old French, or from late Latin transformatio(n-), from the verb transformare (see transform).