What does 'for good' mean?

[Helmy]

English Language Tests, Intermediate level

ESL/EFL Test #722 "Real Life: Using Body Parts as Verbs (2)", question 10

The detective had been gathering evidence on the crime lord for years. Now, he finally had enough evidence to ......... the criminal for good.

(a) hand
(b) nail
(c) shoulder
(d) nose

English Language Tests, Intermediate level

ESL/EFL Test #722 "Real Life: Using Body Parts as Verbs (2)", answer 10

The detective had been gathering evidence on the crime lord for years. Now, he finally had enough evidence to nail the criminal for good.

Correct answer: (b) nail

Your answer was: correct
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what meant for good

[Torsten]

"For good" means "for ever". You will this phrase in any dictionary. Your question should read 'What does for good mean?'
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Test Of English for International Communication
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