Having been changed from an original form. / (of an animal, usually a pet) Neutered; having had testicles or uterus and ovaries removed to prevent procreation.

alteration

present participle of alter

simple past tense and past participle of alter

A kind of car in drag racing, usually with a partial body situated behind the exposed engine.

Capable of being changed, changeable, mutable

Something that can be altered; a variable.

Third-person singular simple present indicative form of alter

plural of alter

The state or quality of being alterable.