a hidden storage space (for money or provisions or weapons)
(computer science) RAM memory that is set aside as a specialized buffer storage that is continually updated; used to optimize data transfers between system elements with different characteristics
the act of reconnoitring (especially to gain information about an enemy or potential enemy); "an exchange of fire occurred on a reconnaissance mission"
a state of violent disturbance and disorder (as in politics or social conditions generally); "the industrial revolution was a period of great turbulence"