Altering; gradually changing.

Something that causes alteration, that alters.

plural of alterant

plural of alterer

One who alters.

(especially in the plural) An identity or headmate of a person with dissociative identity disorder (previously known as multiple personality disorder). A member of a system.

(transitive) To change the form or structure of. / (intransitive) To become different. / (transitive) To tailor clothes to make them fit.

Misspelling of altar.

(medicine, now historical) A medicine or treatment which works by changing processes within the body, rather than by evacuating something etc.

The act of altering or making different. / The state of being altered; a change made in the form or nature of a thing; a changed condition.