shakedown
1. [ noun ] a very thorough search of a person or a place
Examples:

"a shakedown by the police uncovered the drugs"

Related terms: search cant
2. [ noun ] initial adjustments to improve the functioning or the efficiency and to bring to a more satisfactory state
Examples:

"the new industry's economic shakedown"

Related terms: adjustment
3. [ adjective ] intended to test a new system under operating conditions and to familiarize the operators with the system
Examples:

"a shakedown cruise"

4. [ noun ] (slang) extortion of money (as by blackmail)
Related terms: extortion cant