Source : WordNet®

hang on
     v 1: fix to; attach; "append a charm to the necklace" [syn: {append},
           {tag on}, {tack on}, {tack}]
     2: be persistent, refuse to stop; "he persisted to call me
        every night"; "The child persisted and kept asking
        questions" [syn: {persevere}, {persist}, {hang in}, {hold
        on}]
     3: hold the phone line open; "Please hang on while I get your
        folder" [syn: {hold the line}, {hold on}]