killer

中文： 杀手、凶手、杀人犯

1. One who or that which kills. (countable, uncountable) · There’s a killer on the loose.· My cat is a habitual bird killer.
2. That which causes stress or is extremely difficult, especially that which may cause failure at a task. (countable, figuratively, uncountable) · That test was a killer.· The final hill in the race course was a killer.
3. Something that is so far ahead of its competition that it effectively kills off that competition. (countable, figuratively, uncountable) · Digital streaming platforms are CD killers.
4. The killer whale. (countable, uncountable)
5. A remarkably impressive person or thing. (countable, figuratively, uncountable)
6. A knockout form of darts or pool involving several players. (uncountable)
7. A club used for killing fish. (countable, uncountable)
8. A particularly heavy type of handstamp, or portion of one, often obscuring a large part of the postage stamp. (countable, uncountable)

复数 killers