Definition

1. Noun:
   • The process or result of losing or changing colour: "Discolouration" refers to the act of becoming a different, usually less attractive, colour, or the state of having had its colour changed.
   • A stained or faded area: It can also describe a specific mark or patch where the colour has changed or become soiled.

Examples of Usage

• Noun:
  • The discolouration of the old photograph made the faces hard to see.
  • A yellow discolouration appeared on the bathroom ceiling.
  • The discolouration of the leaves indicated a possible disease.

Advanced Usage

• Technical/Scientific Context: In materials science or medicine, "discolouration" often describes an undesirable change in the colour of a substance, material, or tissue.
  • The dentist noted some discolouration on the patient's tooth enamel.
• Art Conservation: Used to describe the degradation of pigments or materials in artworks.
  • The conservator worked to prevent further discolouration of the ancient manuscript.

Variants and Related Words

• Discoloration (noun): The American English spelling of "discolouration". Both forms have identical meanings.
  • Notice the discoloration on the surface of the metal.
• Discolour (verb): To change or lose colour; to stain.
  • Sunlight can discolour fabrics over time.
• Discoloured (adjective): Having lost or changed its original colour.
  • He replaced the discoloured tiles.

Synonyms

• Staining: The process of making a coloured patch or mark.
• Fading: The process of losing colour or brightness.
• Tarnishing: Losing lustre, especially of metals; often used metaphorically for reputation.

Antonyms

• Coloration: The state of being coloured.
• Brightening: The act of making brighter or more vivid in colour.

Related Phrases and Terms

• To cause discolouration: To be the agent that leads to a change in colour.
  • Chlorine in the water can cause discolouration of hair.
• Area of discolouration: A specific spot or region where the colour has changed.
  • The doctor examined the area of discolouration on the skin.

Noun

1. the act of changing the natural color of something by making it duller or dingier or unnatural or faded
2. a soiled or discolored appearance
   • the wine left a dark stain