shakedown (Noun) — Initial adjustments to improve the functioning or the efficiency and to bring to a more satisfactory state. ex. "the new industry's economic shakedown"
shakedown (Noun) — A very thorough search of a person or a place. ex. "a shakedown by the police uncovered the drugs"
shakedown (Noun) — Extortion of money (as by blackmail).
shakedown (Adjective) — Intended to test a new system under operating conditions and to familiarize the operators with the system. ex. "a shakedown cruise"