Source : WordNet®

gaga
     adj 1: mentally or physically infirm with age; "his mother was
            doddering and frail" [syn: {doddering}, {doddery}, {senile}]
     2: marked by foolish or unreasoning fondness; "she was crazy
        about him"; "gaga over the rock group's new album"; "he
        was infatuated with her" [syn: {crazy}, {dotty}, {enamored},
         {infatuated}, {in love}, {smitten}, {soft on(p)}, {taken
        with(p)}]