Definitions for unsecured
Random House Webster's College Dictionary
unbarred, unbolted, unlatched, unlocked, unsecured(adj)
not firmly fastened or secured
"an unbarred door"; "went through the unlatched gate into the street"; "an unlocked room"
without financial security
"an unsecured note"
Not secured; not fastened; not attached.
Of a loan or guarantee, without collateral.