1. to change in form, appearance, or structure; metamorphose.
2. to change in condition, nature, or character; convert.
3. to change into another substance; transmute.
a. to increase or decrease (the voltage and current characteristics of an alternating-current circuit), as by means of a transformer.
b. to decrease (the voltage and current characteristics of a direct-current circuit), as by means of a transformer.
5. Math.to change the form of (a figure, expression, etc.) without in general changing the value.
6. Physics.to change into another form of energy.
to undergo a change in form, appearance, or character; become transformed.
a. a mathematical quantity obtained from a given quantity by an algebraic, geometric, or functional transformation.
b. the transformation itself.
2. the result of a transformation.
3. a transformation.
4. Logic.transformation (def. 5).
5. Ling.a structure derived by a transformation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.