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1. Silly; crazy.
2. Completely absorbed, infatuated, or excited: They were gaga over the rock group's new album.
3. Senile; doddering.
[French, old fool, gaga, of imitative origin.]
1. senile; doting
2. slightly crazy
[C20: from French, of imitative origin]
1. excessively and foolishly enthusiastic: to go gaga over the new fashions.
2. ardently fond; infatuated.
3. crazy; dotty.
4. senile; mentally confused.
[1915–20; < French; imitative]
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|Adj.||1.||gaga - mentally or physically infirm with age; "his mother was doddering and frail"|
old - (used especially of persons) having lived for a relatively long time or attained a specific age; "his mother is very old"; "a ripe old age"; "how old are you?"
|2.||gaga - intensely enthusiastic about or preoccupied with; "crazy about cars and racing"; "he is potty about her"|
colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
enthusiastic - having or showing great excitement and interest; "enthusiastic crowds filled the streets"; "an enthusiastic response"; "was enthusiastic about taking ballet lessons"
1. Informal. Given to lighthearted silliness:
empty-headed, featherbrained, flighty, frivolous, frothy, giddy, harebrained, lighthearted, scatterbrained, silly.
2. Informal. Afflicted with or exhibiting irrationality and mental unsoundness:
brainsick, crazy, daft, demented, disordered, distraught, dotty, insane, lunatic, mad, maniac, maniacal, mentally ill, moonstruck, off, touched, unbalanced, unsound, wrong.
Chiefly British: crackers.
Law: non compos mentis.