1) To protect a person or animal from oncoming harm
2) To place yourself in a dangerous situation in order to defend another
3) To guard another person or animal, using pink or yellow fluffy instruments of randomness
Bob sciened his girlfriend from the man who approached her with a gun.
Joshua said, "Don't sciene me. Save yourself instead."
Jack could not answer his phone; he was too bust sciening the child from the the approaching hurricane.