An opinion or conception formed in advance of adequate knowledge or experience, especially a prejudice or bias.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "preconception" in a sentence
"In other words their argument rests on a certain preconception of God."
"It's about a certain preconception of what is possible, looking at objects from a different angle, and a certain conception about the unknown."
"The preconception is that there is design and that design can be discovered."