'gaga' definitions:

Definition of 'gaga'

(from WordNet)
adjective
Mentally or physically infirm with age; "his mother was doddering and frail" [syn: doddering, doddery, gaga, senile]
adjective
Intensely enthusiastic about or preoccupied with; "crazy about cars and racing"; "he is potty about her" [syn: crazy, wild, dotty, gaga]

Definition of 'gaga'

From: GCIDE
  • gaga \gaga\ adj.
  • 1. mentally or physically infirm with age.
  • Syn: doddering, senile. [WordNet 1.5]
  • 2. marked by foolish or unreasoning fondness; as, gaga over his girlfriend.
  • Syn: crazy about, dotty, enamored, infatuated, in love, smitten, soft on(predicate), taken with(predicate). [WordNet 1.5]

Synonyms of 'gaga'

From: Moby Thesaurus