Meaning

• A contamination, decay or putrefaction, especially in food

• A mark of disgrace, especially on one's character; blemish

• Tincture; hue; colour

• Infection; corruption; deprivation

• A marker indicating that a variable is unsafe and should be subjected to additional security checks.

Meaning

• To contaminate or corrupt (something) with an external agent, either physically or morally.

• To spoil (food) by contamination.

• To be infected or corrupted; to be touched by something corrupting.

• To be affected with incipient putrefaction.

  "Meat soon taints in warm weather."

• To mark (a variable) as unsafe, so that operations involving it are subject to additional security checks.

• To invalidate (a share capital account) by transferring profits into it.