Wordnet 3.0
ADJECTIVE (1)
1.
(of an idea or opinion) formed beforehand;
especially without evidence or through prejudice;
- Example: "certain preconceived notions"
The Collaborative International Dictionary of English v.0.48:
Preconceive \Pre`con*ceive"\, v. t. [imp. & p. p.
Preconceived; p. pr. & vb. n. Preconceiving.]
To conceive, or form an opinion of, beforehand; to form a
previous notion or idea of.
[1913 Webster]
In a dead plain the way seemeth the longer, because the
eye hath preconceived it shorter than the truth.
--Bacon.
[1913 Webster]
WordNet (r) 3.0 (2006):
preconceived
adj 1: (of an idea or opinion) formed beforehand; especially
without evidence or through prejudice; "certain
preconceived notions"
Moby Thesaurus II by Grady Ward, 1.0:
18 Moby Thesaurus words for "preconceived":
anticipatory, beforehand, biased, forejudged, judged beforehand,
preconceptual, preconcluded, predecided, predetermined,
predisposed, predispositional, prejudged, prejudging, prejudiced,
prejudicial, presumed, presupposed, presurmised