What does a priori assumption mean?

a priori assumption meaning in Legal Dictionary

(ah-pree-ory) n. from Latin, an assumption that is correct without additional proof or need certainly to prove it. The assumption is the sun can come up the next day. But has actually an adverse part: an a priori presumption made without question from the foundation that no analysis or study is important, may be psychological laziness when the the truth is not very specific.