lifesaver

noun

1. Someone or something that saves lives.

   “My dad loves his job as a surf lifesaver.”

   “Paramedics are not just ordinary workers but lifesavers with a very important job.”

2. Someone or something that saves lives.

   “They threw him a lifesaver and then hauled him up onto the boat.”

   “Ms Rybicki began filming just as a second IRB drove out to the rogue boat, collecting the first lifesaver into the boat en route.”

3. Someone or something that saves lives.

   “When I got lost in the woods, my Swiss Army knife was a lifesaver.”

   “Dexamethasone hailed as lifesaver for up to a million Covid patients worldwide [title]”

4. (figuratively)Someone or something that is very useful or helpful.

   “Thank you so much for fixing my car; you're a real lifesaver!”

   “This shop is a lifesaver on a hot day when you're craving a cold drink.”

   “Both Netflix and Amazon Prime Video have been lifesavers during the pandemic. Having both is ideal.”