Here ya go .. a bunch of reasonable definitions:
Fact: A basic statement established by experiment or observation. All facts are valid under specific conditions. Some facts may not be valid when re-tested with better instruments.
Law: A logical relationship between two or more things that is based on a variety of facts and hypotheses. It is often a mathematical statement of how two or more quantities relate to each other. A law is a phenomenon that has been observed many times, and no contrary examples found, that it is accepted as a universal phenomenon.
Hypothesis: A tentative statement such as ‘if A happens then B must happen’ that can be tested by direct experiment or observation. A repeatedly verified hypothesis can be expressed as a law or a theory. A disproven hypothesis can sometimes be re-tested and found to be subsequently verified, as measurements improve.
Theory: An explanation for why/how certain laws and facts exist, that can be tested to determine its accuracy. It takes only one negative example to to disprove a theory and you can't examine all examples of a phenomenon throughout all time and space (the problem of induction). Theories are used to make predictions.
Belief: A statement that is not scientifically provable in the same way as facts, laws, hypotheses or theories. Scientifically disproven beliefs can still be held to be true, (unfortunately
).
Cheers