Shakedown (group) definition

(1) Intended to test a new system under operating conditions and to familiarize the operators with the system

"A shakedown cruise"

(2) Extortion of money (as by blackmail)

(3) A very thorough search of a person or a place

"A shakedown by the police uncovered the drugs"

(4) Initial adjustments to improve the functioning or the efficiency and to bring to a more satisfactory state

"The new industry's economic shakedown"