| Noun | 1. | 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"support - something providing immaterial support or assistance to a person or cause or interest; "the policy found little public support"; "his faith was all the support he needed"; "the team enjoyed the support of their fans" | |
| 3. | lifeline - line that raises or lowers a deep-sea diverline - something (as a cord or rope) that is long and thin and flexible; "a washing line" | |
| 4. | lifeline - line thrown from a vessel that people can cling to in order to save themselves from drowningline - something (as a cord or rope) that is long and thin and flexible; "a washing line" ridge rope - either of a pair of lifelines running alongside the bowsprit of a ship | |