Simple Definition of lifeline
: something which provides help or support that is needed for success or survival
: a rope used for saving the life of someone (such as someone who has fallen into water)
Full Definition of lifeline
1 : a line (as a rope) used for saving or preserving life: as a : a line along the outer edge of the deck of a boat or ship b : a line used to keep contact with a person (as a diver or astronaut) in a dangerous or potentially dangerous situation
2 : something regarded as indispensable for the maintaining or protection of life
Examples of lifeline in a sentence
The river is the town's lifeline.
The new jobs were an economic lifeline for a city in need of help.
The radio was their lifeline to the outside world.
They threw a lifeline to the man overboard.
First Known Use of lifeline
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