"lifeline" in the noun sense
1. line of life, life line, lifeline
a crease on the palm its length is said by palmists to indicate how long you will live
2. lifeline
support that enables people to survive or to continue doing something (often by providing an essential connection
"the airlift provided a lifeline for Berlin"
"she offered me a lifeline in my time of grief"
3. lifeline
line that raises or lowers a deep-sea diver
4. lifeline
line thrown from a vessel that people can cling to in order to save themselves from drowning
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License