To proscribe something is to forbid or prohibit it, as a school principal might proscribe the use of cell phones in class.

Proscribe sounds similar to the word prescribe, but be careful: these words are essentially opposite in meaning. While proscribe means forbid, prescribe is used when a doctor recommends a medicine or remedy. Of course, if you want an excuse for not following your doctor’s orders, you could say you were confused about the meaning of these two words — but that would be lying, which is proscribed by most people’s value systems. And it would also be bad for your health.

Definitions of proscribe

v command against

disallow, forbid, interdict, nix, prohibit, veto
allow, countenance, let, permit
consent to, give permission
allow, grant
let have
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prohibit especially by legal means or social pressure
bar, debar, exclude
prevent from entering; keep out
issue an injunction
criminalise, criminalize, illegalise, illegalize, outlaw
declare illegal; outlaw
ban, censor
forbid the public distribution of ( a movie or a newspaper)
Type of:
command, require
make someone do something

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