sav ‧ er /ˈseɪvə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ save , ↑ saver , ↑ saving , savings, SAVIOUR/SAVIOR ; verb : ↑ save ]
someone who saves money in a bank:
Mutual funds have been attractive to small savers (=people who save small amounts of money) .