mentally disturbed; deranged; insane; demented.

enraged; greatly provoked or irritated; angry.

(of animals)

abnormally furious; ferocious

a mad bull.

affected with rabies; rabid

a mad dog.

extremely foolish or unwise; imprudent; irrational

a mad scheme to invade France.

wildly excited or confused: frantic

mad haste.

overcome by desire, eagerness, enthusiasm, etc.; excessively or uncontrollably fond; infatuated

He's mad about the opera.

wildly gay or merry; enjoyably hilarious

to have a mad time at the Mardi Gras.

(of wind, storms, etc.) furious in violence

A mad gale swept across the channel.

an angry or ill-tempered period, mood, or spell

The last time he had a mad on, it lasted for days.

Archaic . to make mad.

Archaic . to be, become, or act mad. ?

like mad, Informal . with great haste, impulsiveness, energy

or enthusiasm

She ran like mad to catch the bus.

mad as a hatter

completely insane.

adjective

balanced , ok , rational , reasonable , sane , sound , calm , cheered , collected , happy , disenchanted , unenthusiastic

adjective

aberrant , absurd , bananas , batty , crazed , cuckoo * , daft , delirious , demented , deranged , distracted , fantastic , foolhardy , foolish , frantic , frenetic , frenzied , illogical , imprudent , invalid , irrational , kooky , loony * , ludicrous , lunatic , mental , non compos mentis , nonsensical , nutty * , off one’s rocker , of unsound mind , out of one’s mind , preposterous , psychotic , rabid , raving , senseless , unbalanced , unhinged , unreasonable , unsafe , unsound , unstable , wacky * , abandoned , agitated , berserk , distraught , enraged , exasperated , excited , fuming , furious , incensed , infuriated , irritated , livid , provoked , raging , resentful , seeing red , uncontrolled , very upset , wild , wrathful , ardent , avid , crazy , devoted , enamoured , enthused , fanatical , fond , hooked * , impassioned , infatuated , keen , nuts * , zealous , choleric , indignant , brainsick , disordered , dotty , maniac , maniacal , mentally ill , moonstruck , off , touched , wrong , harebrained , idiotic , imbecilic , insane , moronic , silly , softheaded , tomfool , unearthly , zany , fervent , warm , angry , bedlamite , certifiable , eccentric , fey , idiosyncratic , impetuous , infatuated. seeangry , irate , irked , loco , obsessed , outraged , possessed , ticked