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HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Adjective batty has 1 sense

• batty(s = adj.all) around the bend, balmy, barmy, bats, bonkers, buggy, cracked, crackers, daft, dotty, fruity, haywire, kookie, kooky, loco, loony, loopy, nuts, nutty, round the bend, wacky, whacky - informal or slang terms for mentally irregular; "it used to drive my husband balmy"

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

batty

apish, asinine, balmy, bananas, barmy, bats, beany, bedlamite, befooled, beguiled, besotted, bonkers, brainless, buffoonish, buggy, bughouse, bugs, cockeyed, cracked, crackers, crazed, crazy, credulous, cuckoo, daffy, daft, dazed, deranged, dippy, dizzy, doting, dotty, dumb, fatuitous, flipped, fond, fool, foolheaded, foolish, freaked-out, fruitcakey, fruity, fuddled, futile, gaga, goofy, gulled, haywire, idiotic, imbecile, inane, inept, infatuated, insane, just plain nuts, kooky, loony, loopy, mad, maniac, maudlin, moronic, nuts, nutty, off the hinges, off the track, off the wall, potty, round the bend, sappy, screwball, screwballs, screwy, senseless, sentimental, silly, slaphappy, stupid, thoughtless, wacky, wet, witless

For further exploring for "batty" in Webster Dictionary Online