The correct grammatical use(s) and spellings of the word prejudice

Hi, and thanks for the question.

Prejudice (no 'd' before the 'j') is  a much-misspelled word.

It can be a noun........"They were victims of prejudice" or in plural
"They showed their prejudices"

and it can be a verb ..."News reports can prejudice a jury" or "She
deliberately prejudices herself against anything new."

and it can, in its past participle form, prejudiced, be an adjective
...."The prejudiced jury reached an unfair verdict." 


The Columbia guide to standard english at :
http://www.bartleby.com/68/36/4736.html
has this to say if you want a formal definition of the above

prejudice (n., v.), prejudiced (adj.) 
    
A prejudice may be either a predisposition in favor of something or a
predisposition opposed to it, and the verb reflects these same two
diametrically opposite views; hence context must make clear which sort
is meant, especially since, left unspecified, prejudice will usually
be taken to be negative, pejorative, and against.

The verb prejudice combines most frequently with a direct object or a
reflexive pronoun followed by against, toward(s), or (rarely) in favor
of:
- His nagging prejudiced the children against [toward(s)] him. 
- She deliberately prejudices herself against [in favor of] anything new. 

The noun prejudice combines with these same prepositions, again only
rarely with in favor of:
- Her prejudices against [toward(s), in favor of] Italian cooking are well known. 

The preposition to is Standard only in the phrase without prejudice to: 
- My decision is quite without prejudice to any new proposals. 


Hope that answers your question, but please ask if you'd like anything
clarified before rating

willie-ga

Search used
usage prejudice

My former English teacher was of the opinion that prejudice was always
against something. If one has an unreasoning preference in favour of
something, that is a bias. So one is biased in favour and prejudiced
against something.
However, this was in the Uk in the 1970s, so practice may have
changed, or may differ from British usage in the USA and elsewhere.
Best wishes,
Amber

Wonderful answer, Willie!

One of my pet peeves is the sloppy usage of the word "prejudice" as if
it were an adjective, as in "It's impossible to get a fair trial if
the jury is prejudice." I have seen this usage in print several times.
Even my local newspaper seems to have lost its grip on the proper use
of this word and its variants.

"Prejudice" may be a noun or a verb. The adjectival form is "prejudiced."