The change of something that is defective, broken, inefficient or otherwise negative, in order to correct or improve it

(transitive) To put into a new and improved form or condition; to restore to a former good state, or bring from bad to good; to change from worse to better

(grammar) Referring back to the subject, or having an object equal to the subject.

(grammar) A reflexive pronoun. / (grammar) A reflexive verb.

(physics) The turning or bending of any wave, such as a light or sound wave, when it passes from one medium into another of different optical density.

A statement which refers to itself.

(chemistry, physics) an electrode with a stable and accurately known electrode potential

Raised skin, usually caused by the involuntary erection of hairs on the neck or arms caused by cold, excitement, or fear.

(politics) A direct popular vote on a proposed law or constitutional amendment. The adposition on is usually used before the related subject of the vote.

(soccer, Britain): One of the two officials at an association football match, previously known as linesmen, who assist the referee.