Premonition

A premonition is a vision of a future event, having them is a power possessed by some good witches so that they can see an innocent they are supposed to save.

Premontions were one of Melinda Warrens powers, and as such they were passed down to several of her descendants including Phoebe Halliwell, one of the Charmed Ones. ("Something Wicca This Way Comes")

While Patty Halliwell was pregnant with Phoebe, she occasionally had premonitions even though it wasn't her power. One of her first premonitions was the arrival of three woman that would try to abduct Piper and Prue shortly after she became pregnant. She later found that the three woman were actually adult versions of the children. Later, as she was giving birth to Phoebe - she had a premonition of years later when the she and her three daughters would hug, her children as adults. This event later came to pass when she returned from the dead shortly for Piper's wedding day. ("That '70s Episode", "Just Harried")

Phoebe Halliwell
Phoebe received her first premonition while riding her bicycle shortly after returning from New York, of three boys roller blading and getting hit by a car. Having read the Book of Shadows the night before, she immediately knew this was a future event and rode in between the two to stop it from happening. This was the first of many premonitions she would receive of innocents she and the Charmed Ones were meant to save. Initially, they were short bursts of information in black and white, and only of the future, and only when she was touching something related. She also couldn't get a premonition on command. Her power great less than a year later to be able to see the past as well, when she got a vision off of a locket of an event that happened in the 17th century. ("Something Wicca This Way Comes", "The Witch Is Back")