A person who rescues someone from a dangerous or difficult situation. The lifeguard was a real life-saver when he pulled the drowning child from the pool.
A device or object that provides a means of rescue or relief in a critical situation. The life jacket was a life-saver during the storm at sea.
A candy shaped like a ring, often fruit-flavored, known as Life Savers. She offered me a cherry Life Saver from the pack she had in her purse.