Paranoia is a mental disorder with delusions or extreme irrational fear or distrust of others.
(noun)An example of paranoia is someone thinking that everyone is out to get them.
See paranoia in Webster's New World College Dictionary
noun
Origin: ModL < Gr, derangement < para-, beside (see para-) + nous, the mind
See paranoia in American Heritage Dictionary 4
noun
Origin:
Origin: Greek, madness
Origin: , from paranoos, demented
Origin: : para-, beyond; see para-1
Origin: + nous, noos, mind
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