http://dictionary.findlaw.com/definition/unreasonable.html
Unreasonable
unreasonable adj
1: not reasonable
2: beyond what can be accepted: as
a : clearly inappropriate, excessive, or harmful in degree or kind [an delay] [an restraint of trade]
b : lacking justification in fact or circumstance [an inference]
c : not supported by a warrant or by a valid exception to a warrant requirement (
as when there is reasonable suspicion) and therefore unconstitutional [the right of the people to be secure in their persons, houses, papers, and effects, against searches and seizures, shall not be violated "U.S. Constitution amend. IV"]